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NCP3066, NCV3066 Up to 1.5 A Constant Current Switching Regulator for LEDs with ON/OFF Function
The NCP3066 is a monolithic switching regulator designed to deliver constant current for powering high brightness LEDs. The device has a very low feedback voltage of 235 mV (nominal) which is used to regulate the average current of the LED string. In addition, the NCP3066 has a wide input voltage up to 40 V to allow it to operate from a 12 Vac or a 12-36 Vdc supply, commonly used for lighting applications as well as unregulated supplies such as rechargeable batteries. The NCP3066 switching regulator can be configured in Step-Down (Buck), Step-Up (Boost) and Voltage-Inverting topologies with a minimum number of external components. The ON/OFF pin provides PWM dimming capability or a low power shutdown mode.
Features http://onsemi.com MARKING DIAGRAMS
3066 ALYWG G 1
8 1 SOIC-8 D SUFFIX CASE 751
* * * * * * * * * * *
Integrated 1.5 A Switch Input Voltage Range from 3.0 V to 40 V Logic Level Shutdown Capability Low Feedback Voltage of 235 mV Cycle-by-Cycle Current Limit No Control Loop Compensation Required Frequency of Operation Adjustable up to 250 kHz Analog and Digital PWM Dimming Capability Internal Thermal Shutdown with Hysteresis NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes These are Pb-Free Devices
NCP3066 AWL YYWWG
8
1
PDIP-8 P, P1 SUFFIX CASE 626
3066 ALYWG G
Applications
* Automotive and Marine Lighting * Constant Current Source, High Brightness LED Driver * Low Voltage and Landscape Lighting
ON/OFF Rsense ON/OFF Ipk NCP3066 SWC L1 LED+ LED1 COUT D1 LEDn LED- CT Rs
1 DFN8 MN SUFFIX CASE 488AF
SWE CT
VCC CIN
VCC COMP
GND
GND
Figure 1. Typical Buck Application Circuit
(c) Semiconductor Components Industries, LLC, 2009
January, 2009 - Rev. 3
CC CC CC CC CC CC CC CC
C C C C C C C C
NCP3066 A L, WL Y, YY W, WW G or G
= = = = = =
Specific Device Code Assembly Location Wafer Lot Year Work Week Pb-Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package dimensions section on page 17 of this data sheet.
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Publication Order Number: NCP3066/D
NCP3066, NCV3066
SOIC-8/PDIP-8 Switch Collector Switch Emitter Timing Capacitor GND 2 3 4 (Top View) 1 8 7 6 5 ON/OFF Ipk Sense VCC Comparator Inverting Input NOTE: DFN8
Switch Emitter
Timing Capacitor
EP Flag
GND
(Top View)
EP Flag must be tied to GND Pin 4 on PCB
Figure 2. Pin Connections
Figure 3. Pin Connections
8 ON/OFF ON/OFF
TSD 1
Bias R S 7 Ipk Sense Comparator - + 0.2 V 6 VCC Comparator + - 0.235V Reference Regulator 4 S R 2 Q CT 3 Q
Switch Collector
Switch Emitter Oscillator
Timing Capacitor
GND
5 Comparator Inverting Input
Figure 4. Block Diagram
PIN DESCRIPTION
Pin No. PDIP8 1 2 3 4 5 6 7 8 DFN8 1 2 3 4, EP Flag 5 6 7 8 Pin Name Switch Collector Switch Emitter Timing Capacitor GND Comparator Inverting Input VCC Ipk Sense ON/OFF Description Internal Darlington switch collector. Internal Darlington switch emitter. Timing Capacitor to control the switching frequency. Ground pin for all internal circuits. Inverting input pin of internal comparator. Voltage Supply Peak Current Sense Input to monitor the voltage drop across an external resistor to limit the peak current through the circuit. ON/OFF Pin. To disable the device, this input should be pulled below 0.8 V. If the pin is left floating, it will be disabled.
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C C C C
CC CC CC CC
Switch Collector
ON/OFF Ipk Sense VCC Comparator Inverting Input
NCP3066, NCV3066
MAXIMUM RATINGS (measured vs. Pin 4, unless otherwise noted)
Rating VCC Pin 6 Comparator Inverting Input Pin 5 Darlington Switch Collector Pin 1 Darlington Switch Emitter Pin 2 (Transistor OFF) Darlington Switch Collector to Emitter Pins 1-2 Darlington Switch Current Ipk Sense Pin 7 Timing Capacitor Pin Voltage (Pin 3) Moisture Sensitivity Level Lead Temperature Soldering ON/OFF Pin voltage POWER DISSIPATION AND THERMAL CHARACTERISTICS PDIP-8 (Note 5) Thermal Resistance Junction-to-Air SOIC-8 (Note 5) Thermal Resistance Junction-to-Air DFN-8 (Note 5) Thermal Resistance Junction-to-Air Thermal Resistance Junction-to-Case Storage Temperature Range Maximum Junction Temperature Operating Junction Temperature Range (Note 3) NCP3066 NCV3066 RqJA RqJA 100 180 78 14 -65 to +150 +150 0 to +85 -40 to +125 C/W C/W C/W Symbol VCC VCII VSWC VSWE VSWCE ISW VIPK VTC MSL TSLD VON/OFF Value 0 to +42 -0.3 to + VCC -0.3 to + 42 -0.6 to + VCC -0.3 to + 42 1.5 -0.3 to VCC+ 0.3 -0.2 to +1.4 1 260 (-0.3 to +25) < VCC Unit V V V V V A V V - C V
RqJA RqJC TSTG TJMAX TJ
C C C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. This device series contains ESD protection and exceeds the following tests: Pin 1-8: Human Body Model 2000 V per AEC Q100-002; 003 or JESD22/A114; A115 Machine Model Method 200 V 2. This device contains latch-up protection and exceeds 100 mA per JEDEC Standard JESD78. 3. The relation between junction temperature, ambient temperature and Total Power dissipated in IC is TJ = TA + Rq * PD. 4. The pins which are not defined may not be loaded by external signals. 5. 35 mm copper, 10 cm2 copper area.
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NCP3066, NCV3066
ELECTRICAL CHARACTERISTICS (VCC = 5.0 V, -40C < TJ < +125C for NCV3066, 0C < TJ < +85C for NCP3066 unless
otherwise specified) Symbol OSCILLATOR fOSC Frequency (VPin5 = 0 V, CT = 2.2 nF, TJ = 25C) (Pin 7 to VCC, TJ = 25C) (Pin 7 to VCC, TJ = 25C) (Pin 7 to VCC, TJ = 25C) (TJ = 25C) (Note 7) 165 110 5.5 150 6.0 1650 275 200 235 190 6.5 kHz - mA mA mV Characteristic Conditions Min Typ Max Unit
IDISCHG/ICHG Discharge to Charge Current Ratio IDISCHG ICHG VIPK(Sense) Capacitor Discharging Current Capacitor Charging Current Current Limit Sense Voltage
OUTPUT SWITCH (Note 6) VSWCE(DROP) Darlington Switch Collector to Emitter Voltage Drop IC(OFF) VTH Collector Off-State Current (ISW = 1.0 A, TJ = 25C) (Note 6) (VCE = 40 V) TJ = 25C TJ = 0C to 85C TJ = -40C to +125C REGLiNE ICII in VIH VIL IIH IIL TON_MIN ICC Threshold Voltage Line Regulation Input Bias Current (VCC = 3.0 V to 40 V) (Vin = Vth) TJ = 25C TJ = 0C to +85C
J = 25C TJ = 0C to +85C
1.0 1.0
1.3 10
V mA
COMPARATOR Threshold Voltage 235 -5% -10% -6.0 -1000 235 235 2.0 -100 +5% +10% 6.0 1000 mV nA mV
ON/OFF FEATURE ON/OFF Pin Logic Input Level High VOUT = 0 V ON/OFF Pin Logic Input Level Low VOUT = Nominal Output Voltage ON/OFF Pin Input Current ON/OFF Pin = 5 V (ON) ON/OFF Pin Input Current ON/OFF Pin = 0 V (OFF) ON/OFF Pin Minimum Width 2.2 2.4 - - - - - - 15 1.0 50 - - 1.0 0.8 V V mA mA ms
TJ = 25C TJ = 25C TJ = 25C (VCC = 5.0 V to 40 V, CT = 2.2 nF, Pin 7 = VCC, VPin 5 > Vth, Pin 2 = GND, remaining pins open) ON/OFF Pin = 5.0 V (OFF) TJ = 25C TJ = -40C to +125C
TOTAL DEVICE Supply Current 7.0 mA
ISTBY
Standby Quiescent Current
85 160 10
120 120
mA
TSHD TSHDHYS
Thermal Shutdown Threshold Hysteresis
C C
6. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient temperature as possible. 7. The VIPK (Sense) Current Limit Sense Voltage is specified at static conditions. In dynamic operation the sensed current turn-off value depends on comparator response time and di/dt current slope. See the Operating Description section for details. 8. NCV prefix is for automotive and other applications requiring site and change control and extended operating temperature conditions.
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NCP3066, NCV3066
350 300 FREQUENCY (kHz) FREQUENCY (kHz) 0 2 4 6 8 10 12 14 16 18 20 250 200 150 100 50 0 150 145 140 135 130 125 120
0
5
10
15
20
25
30
35
40
Ct, CAPACITANCE (nF)
VIN, INPUT VOLTAGE (V)
Figure 5. Oscillator Frequency vs. Timing Capacitor
2.3 2.1 VOLTAGE DROP (V) 1.9 1.7 1.5 1.3 1.1 0.9 -40 -20 0 ICE = 0.5 A ICE = 0.25 A ICE = 1.25 A VOLTAGE DROP (V) ICE = 1 A ICE = 0.75 A 1.3 1.2 1.1 1.0 0.9 0.8 0.7 60 80 100 120 140
Figure 6. Oscillator Frequency vs. Supply Voltage
ICE = 1.25 A
ICE = 1 A ICE = 0.75 A
ICE = 0.5 A ICE = 0.25 A 0 20 40 60 80 100 120 140
20
40
0.6 -40 -20
TJ, JUNCTION TEMPERATURE (C)
TJ, JUNCTION TEMPERATURE (C)
Figure 7. Voltage Drop in Emitter Follower Configuration
Figure 8. Common Emitter Configuration Output Darlington Switch Voltage Drop vs. Temperature
0.240 REFERENCE VOLTAGE (V) 0.238 0.236 0.234 0.232 0.230 -40 -20
Vipk, CURRENT LIMIT SENSE VOLTAGE (V)
0.200 0.195 0.190 0.185 0.180 0.175 0.170 -40 -20
0
20
40
60
80
100
120
140
0
20
40
60
80
100
120 140
TJ, JUNCTION TEMPERATURE (C)
TJ, JUNCTION TEMPERATURE (C)
Figure 9. Vth vs. Temperature
Figure 10. Current Limit Sense Voltage vs. Temperature
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NCP3066, NCV3066
450 STANDBY SUPPLY CURRENT (mA) 400 350 300 250 200 150 100 50 0 0 5 10 15 20 25 30 Vin, INPUT VOLTAGE (V) 35 40
Figure 11. Standby Supply Current vs. Supply Voltage
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NCP3066, NCV3066
INTRODUCTION The NCP3066 is a monolithic power switching regulator optimized for LED Driver applications. Its flexible architecture enables the system designer to directly implement step-up, step-down, and voltage-inverting converters with a minimum number of external components for driving LEDs. A representative block diagram is shown in Figure 3.
Operating Description
comparator value, the output switch cycle is inhibited. When the load current causes the output voltage to fall below the nominal value feedback comparator enables switching immediately. Under these conditions, the output switch conduction can be enabled for a partial oscillator cycle, a partial cycle plus a complete cycle, multiple cycles, or a partial cycle plus multiple cycles.
Oscillator
The NCP3066 operates as a fixed oscillator frequency output voltage ripple gated regulator. In general, this mode of operation is somewhat analogous to a capacitor charge pump and does not require dominant pole loop compensation for converter stability. The typical operating waveforms are shown in Figure 12. The output voltage waveform is shown for a step-down converter with the ripple and phasing exaggerated for clarity. During initial converter startup, the feedback comparator senses that the output voltage level is below nominal. This causes the output switch to turn on and off at a frequency and duty cycle controlled by the oscillator, thus pumping up the output filter capacitor. When the output voltage level reaches nominal
The oscillator frequency and off-time of the output switch are programmed by the value of the timing capacitor CT. The capacitor CT is charged and discharged by a 1 to 6 ratio internal current source and sink, generating a positive going sawtooth waveform at Pin 3. This ratio sets the maximum tON/(tON + tOFF) of the switching converter as 6/(6+1) or 85.7% (typical). The oscillator peak and valley voltage difference is 500 mV typically. To calculate the CT capacitor value for required oscillator frequency, use the equations found in Figure 15. An online NCP3066 design tool can be found at www.onsemi.com, which aids in selecting component values.
Figure 12. Typical Operating Waveforms
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NCP3066, NCV3066
Peak Current Sense Comparator
Under normal conditions, the output switch conduction is initiated by the Voltage Feedback comparator and terminated by the oscillator. Abnormal operating conditions occur when the converter output is overloaded or when feedback voltage sensing is lost. Under these conditions, the Ipk Current Sense comparator will protect the Darlington output Switch. The switch current is converted to a voltage by inserting a fractional ohm resistor, RSense, in series with VCC and Darlington output switch. The voltage drop across RSense is monitored by the Current Sense comparator. If the voltage drop exceeds 200 mV (nom) with respect to VCC, the comparator will set the latch and terminate the output switch conduction on a cycle-by-cycle basis.
Real Vturn-off on Rs Resistor I1 di/dt slope Io t_delay I through the Darlington Switch
Darlington Switch is enabled again when the chip temperature decreases under the low threshold. This feature is provided to prevent catastrophic failures from accidental device overheating. It is not intended to be used as a replacement for proper heatsinking.
Output Switch
The output switch is designed in Darlington configuration. This allows the application designer to operate at all conditions at high switching speed and low voltage drop. The Darlington Output Switch is designed to switch a maximum of 40 V collector to emitter voltage and current up to 1.5 A.
ON/OFF Function
Vipk(sense)
Figure 13. Current Sense Waveform
The VIPK(Sense) Current Limit Sense Voltage threshold is specified at static conditions. In dynamic operation the sensed current turn-off value depends on comparator response time and di/dt current slope. Real Vturn-off on Rsc resistor Vturn_off = Vipk(sense) + RSense*(tdelay*di/dt) Typical Ipk comparator response time tdelay is 350 ns. The di/dt current slope is dependent on the voltage difference across the inductor and the value of the inductor. Increasing the value of the inductor will reduce the di/dt slope. It is recommended to verify the actual peak current in the application at worst conditions to be sure that the max peak current will never get over the 1.5 A Darlington Switch Current max rating.
Thermal Shutdown
The ON/OFF function provides interruption of switching and puts the circuitry into the low consumption mode. This feature is applicable for digital dimming of the LEDs as well. The ON/OFF signal inhibits switching of the regulator and reduces the average current through the LEDs. The frequency of this pulse width-modulated signal with the duty cycle can range from less than 1% to 100% is limited by the value of 1 kHz. Pulling this pin below 0.8 V or leaving it opened turns the regulator off. In this state the consumption of the device is reduced below 100 uA. Pulling this pin above 2.4 V (up to max. 25 V) allows the regulator running in normal state. If the ON/OFF feature is not needed, the ON/OFF pin can be wired to VCC, provided this voltage does not exceed 25 V.
No Output Capacitor Operation
Internal thermal shutdown circuitry is provided to protect the IC in the event that the maximum junction temperature is exceeded. When activated, typically at 160C, the Darlington Output Switch is disabled. The temperature sensing circuit is designed with some hysteresis. The
A traditional buck topology includes an inductor followed by an output capacitor which filters the ripple. The capacitor is placed in parallel with the LED or array of LEDs to lower the ripple current. A constant current buck regulator such as the NCP3066 focuses on the control of the current through the load, not the voltage across it. The switching frequency of the NCP3066 is in the range of 100-250 kHz which is much higher than the human eye can detect. By configuring the NCP3066 in a continuous conduction buck configuration with low peak to peak ripple the output filter capacitor can be eliminated. The important design parameter is to keep the peak current below the maximum current rating of the LED. Using 15-40% peak to peak ripple results in a good compromise between achieving max average output current without exceeding the maximum limit. This saves space and reduces part count for applications.
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NCP3066, NCV3066
APPLICATIONS Figures 15 through 24 show the simplicity and flexibility of the NCP3066. Two main converter topologies are demonstrated with actual test data shown below each of the circuit diagrams. The demo boards have an input for a digital dimming signal. You can provide a PWM signal to change
Parameter Step-Down
the average output current and reduce the LED brightness. Figure 14 gives the relevant design equations for the key parameters. Additionally, a complete application design aid for the NCP3066 can be found at www.onsemi.com.
Step-Up
ton toff ton
Vout ) VF Vin * VSWCE * Vout
ton toff ton toff
Vout ) VF * Vin Vin * VSWCE
ton toff ton toff
f CT IL(avg) Ipk (Switch) RSC L Vripple(pp) DIL Iout
)1
*6
f * 343 10 *12 Iout
)1
CT + 381.6 @ 10 fosc Iout IL(avg) ) DIL 2
ton )1 toff DIL 2
IL(avg) )
0.20 Ipk (Switch) Vin * VSWCE * Vout DIL 1 8 f CO V ref Rs
2
0.20 Ipk (Switch) ton Vin * VSWCE DIL ton Iout CO ) DIL V ref Rs ton
) (ESR) 2
ESR
9. VSWCE - Darlington Switch Collector to Emitter Voltage Drop, refer to Figures 7 and 8. 10. VF - Output rectifier forward voltage drop. Typical value for 1N5819 Schottky barrier rectifier is 0.4 V. 11. The calculated ton/toff must not exceed the minimum guaranteed oscillator charge to discharge ratio.
Figure 14. Design Equations The Following Converter Characteristics Must Be Chosen:
Vin - Nominal operating input voltage. Vout - Desired output voltage. Iout - Desired output current. DIL - Desired peak-to-peak inductor ripple current. For maximum output current it is suggested that DIL be chosen to be less than 10% of the average inductor current IL(avg). This will help prevent Ipk (Switch) from reaching the current limit threshold set by RSC. If the design goal is to use a minimum inductance value, let DIL = 2(IL(avg)). This will proportionally reduce converter output current capability. f - Maximum output switch frequency. Vripple(pp) - Desired peak-to-peak output ripple voltage. For best performance the ripple voltage should be kept to a low value since it will directly affect line and load regulation. Capacitor CO should be a low equivalent series resistance (ESR) electrolytic designed for switching regulator applications.
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NCP3066, NCV3066
Q1 L1 +LED
ON/OFF
Input R11 1k0 C9 100p -LED D2 ... ON/OFF Ipk NCP3066 SOIC SWC SWE CT GND IC1 C10 2n2 R19 1k0 C5 1n8 D1 R16 R68 R17 R33 C8 m15 C7 100nF R12 12k R15 1k0
R1 ... R9
Q2
R10 10k
VIN +
9 x 0R15
VCC COMP
C1 + 220 mF C2 0.1 mF GND
Figure 15. Buck Demoboard with External Switch Application Schematic Table 1. BILL OF MATERIALS
Designator R1;R2; R3;R4 R10 R11; R15 R12 R16 R17 R19 C1 C2;C7 C5 C8 C9 C10 Q1 Q2 D2 IC1 D1 L1 Qty 4 1 2 NU 1 OPTION 1 1 2 1 1 1 1 1 1 1 1 1 1 Description Resistor Resisitor Resisitor Resistor Resistor Resistor Resistor Capacitor Capacitor Capacitor Capacitor Capacitor Capacitor Power MOSFET -25A, -30V Switching NPN Transistor 1A, 30V Schottky Rectifier Switching Regulator 3A, 30V Schottky Rectifier Inductor Value 0.15R 10k 1k 12k 0.68R 0.33R 1k 220mF/35V 100nF 1.8nF 150mF/16V 100pF 2.2nF NTD18P03L MMBT489LT1G MBR130T1G NCP3066DR2G MBRS330T3G 47 mH Tolerance 1% 1% 1% 1% 5% 5% 5% 20% 10% 10% 20% 10% 10% 20% Footprint 1206 1206 1206 1206 1210 1210 1210 10x12.5 1206 1206 F8 1206 1206 DPAK SOT-23 SOD123 SOIC-8 SMC Wurth Elektronik Manufacturer Susumu Rohm Rohm Rohm Panasonic - ECG Panasonic - ECG Panasonic - ECG Panasonic Kemet Kemet SANYO Vishay/Vitramon Kemet ON Semiconductor ON Semiconductor ON Semiconductor ON Semiconductor ON Semiconductor Wurth Elektronik Manufacturer Part Number RL1632R-R150-F MCR18EZHF1002 MCR18EZPF1001 MCR18EZHF1202 ERJ-14RQJR68U ERJ-14RQJR33U ERJ-14YJ102U EEUFC1V221 C1206C104K5RACTU C1206C182K5RACTU 16SP150M VJ1206Y101KXEAT5Z C1206C222K5RACTU NTD18P03L MMBT489LT1G MBR130T1G NCP3066DR2G MBRS330T3G WE-PD4 74457147
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NCP3066, NCV3066
Figure 16. Buck with External Switch Demoboard Layout
Figure 17. Buck with External Switch Demoboard Photo
90 85 80 EFFICIENCY (%) 75 70 65 60 55 50 10 15 20 700 mA 2 LED (Vout = 6.4 V)
350 mA 4 LED (Vout = 12.8 V) 700 mA 4 LED (Vout = 12.8 V)
350 mA 2 LED (Vout = 6.4 V)
Figure 15, Buck Demoboard With External Switch Application Schematic illustrates the NCP3066 being used as a PFET controller. Table 1. Bill Of Materials shows the small number of additional parts which are necessary to assemble mentioned demoboard. The demoboard based on two layer PCB and the layout is mentioned in Figure 16. Buck Demoboard Layout. The Line regulation is mentioned in Figure 20, Line Regulation. The Figure 21, Dimming characteristic shows behavior of circuitry in case the square wave signal with 5 V amplitude and 300 Hz frequency was delivered into ON/OFF pin of device.
35
25
30
INPUT VOLTAGE (V)
Figure 18. Efficiency of Buck LED Driver
95 90 85 EFFICIENCY (%) 80 75 70 65 60 55 10 15 20 25 30 35 3 A 2 LED (Vout = 6.4 V) 3 A 4 LED (Vout = 12.8 V)
INPUT VOLTAGE (V)
Figure 19. Efficiency of Buck LED Driver at Iout = 3 A
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NCP3066, NCV3066
0.70 0.60 OUTPUT CURRENT (A) 0.50 0.40 0.30 0.20 0.10 0 8 10 12 14 Iout = 300 mA Iout = 600 mA Iout = 450 mA Pled (W) 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 5 10 20 30 40 50 60 70 80 ON/OFF PIN DUTY CYCLE (%) 90 100 Vin = 25 V Vin = 10 V - 15 V
Iout = 150 mA
Figure 20. Line Regulation
16 18 20 22 INPUT VOLTAGE (V)
24
26
28
30
Figure 21. Dimming Characteristic
Table 2. TEST RESULTS
Line Regulation Output Ripple Efficiency Vin = 12 V to 35 V, Iout = 3000 mA Vin = 12 V, Iout = 3000 mA Vin = 12 V, Iout = 3000 mA 250 mA 320 mA 80%
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NCP3066, NCV3066
ON/OFF Input L1 100mH R6 10k R1 R15 R2 100R ON/OFF Ipk VIN + C1 m18 C2 100n VCC COMP NCP3066 SOIC SWC SWE CT GND R3 1k0 C3 2n2 3 x 100mF R5 C6 R68 R4 100R D2 -LED D1 +LED
C4
C5
IC1 GND
Figure 22. Boost demoboard Application Schematic
Table 3. BILL OF MATERIALS
Designator R1 R2;R4 R3 R5 R6 C1 C2 C3 C4,C5,C6 C10 IC1 D1 D2 L2 Qty 1 NU 1 1 1 1 1 1 3 1 1 1 1 1 Description Resistor Resisitor Resisitor Resistor Resistor Capacitor Capacitor Capacitor Capacitor Capacitor Switching Regulator Diode Zener Diode Inductor Value 0.15R 100R 1k 0.68R 10k 180mF 100nF 2.2nF 100mF 2.2nF NCP3066DR2G MBRS1540T3G BZX84B18VLT1G 100mH Tolerance 1% 1% 1% 5% 1% 20% 10% 10% 20% 10% 20% Footprint 1206 1206 1206 1210 1206 F8 1206 1206 1210 1206 SOIC-8 SMB SOT-23 Coilcraft Manufacturer Susumu Vishay/Dale Rohm Panasonic - ECG Rohm SANYO Kemet Kemet TDK Kemet ON Semiconductor ON Semiconductor ON Semiconductor Coilcraft Manufacturer Part Number RL1632R-R150-F CRCW1206100RFKEA MCR18EZPF1001 ERJ-14RQJR68U MCR18EZHF1002 16SVPS180M C1206C104K5RACTU C1206C222K5RACTU C4532Y5V1A107Z C1206C222K5RACTU NCP3066DR2G MBRS1540T3G BZX84B18VLT1G DO3316P-104MLB
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NCP3066, NCV3066
Figure 23. Boost Demoboard Layout
95 90 EFFICIENCY (%) 85 80 75 70 65 60 5 7 9 11 13 15 17 19 150 mA 6 LED (19.2 V) 150 mA 8 LED (25.6 V)
Figure 24. Boost Demonstration Photo
Figure 25. Boost LED Driver Efficiency
3.50 3.0 LED POWER (W) 2.50 2.0 1.50 1.0 0.50 0 0 10 20 30 40
INPUT VOLTAGE (V)
Figure 22, Boost Demoboard Application Schematic, illustrates the basic circuitry in boost topology, which allows supplying string up to eight LEDs up to 150 mA consumption. Table 3, Bill of Materials shows the small number of additional parts which are necessary to assembly mentioned demoboard. The demoboard based on one layer PCB and the layout is shown in Figure 23, Buck Demoboard Layout. The photo of this demoboard is mentioned in Figure 24, Boost Demoboard Photo. Figure 26, Dimming Characteristic shows behavior of circuitry in case the square wave signal with 5 V amplitude and 300 Hz frequency was delivered into ON/OFF pin of device. There was tested eight LEDs string with 150 mA consumption and VIN = 10 V at room temperature. The efficiency of this demoboard is mentioned in Figure 25. Efficiency of Boost LED Driver.
50
60
70
80
90
100
Figure 26. Dimming Characteristic
ON/OFF DUTY CYCLE (%)
Table 4. TEST RESULTS
Line Regulation Output Ripple Efficiency Vin = 10 V to 20 V, Vout = 19.2 V, Iout = 350 mA Vin = 10 V to 20 V, Vout = 19.2 V, Iout = 350 mA Vin = 12 V, Vout = 19.2 V, Iout = 350 mA 25 mA 55 mA 85%
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NCP3066, NCV3066
ON/OFF Input
L1 NCP3066 R6 R1 10k VIN R2 R15 100R ON/OFF Ipk Vcc COMP C1 330 mF GND C2 0.1 mF IC1 C10 2n2 3 x 100 mF SOIC SWC SWE CT GND R3 1k0 C3 C4 C5 R7 12k 47 mH D2
+LED
-LED D1 R4 R6 R68 100R
Figure 27. Buck Demoboard Application Schematic
Table 5. BILL OF MATERIALS
Designator R1 R2; R5 R3 R4 R6 R7 C1 C2 C3 C4, C5, C6 IC1 D1 D2 L1 Qty. 1 NU 1 1 1 NU 1 1 1 3 1 1 1 1 Description Resistor Resisitor Resisitor Resistor Resisitor Resisitor Capacitor Capacitor Capacitor Capacitor Switching Regulator Diode Zener Diode Inductor Value 0.15R 100R 1k 0.68R 10 k 12 k 330 mF 100 nF 2.2 nF 100 mF NCP3066 MBRS1504 BZX84C8V2 47 mH Tolerance 1% 1% 1% 5% 1% 1% 20% 10% 10% 20% 20% Footprint 1206 1206 1206 1210 1206 1206 F8 1206 1206 1210 SOIC8 SMB SOT23 DO3316 Manufacturer Susumu Vishay/Dale Rohm Panasonic - ECG Rohm Rohm PANASONIC Kemet Kemet TDK ON Semiconductor ON Semiconductor ON Semiconductor CoilCraft Manufacturer Part Number RL1632R-R150-F CRCW1206100RFKEA MCR18EZPF1001 ERJ-14RQJR68U MCR18EZHF1002 MCR18EZPF1202 EEEFK1E331GP C1206C104K5RACTU C1206C222K5RACTU C4532Y5V1A107Z NCP3066DR2G MBRS1504T3G BZX84C8V2LT1G DO3316P-473MLB
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NCP3066, NCV3066
Figure 28. Buck Demoboard Layout
Figure 29. Buck Demonstration Photo
The Figure 27 Buck demoboard Application schematic illustrates the basic circuitry in buck topology, which allows supplying one or two LEDs up to 350 mA consumption. The TABLE 5 BILL OF MATERIALS shows the small number of additional parts which are necessary to assembly
0.40 0.35 OUTPUT CURRENT (mA) 0.30 0.25 0.20 0.15 0.10 0.05 0 5 10 15 20 25 30 35 1 LED 100 mA 1 LED 350 mA
mentioned demoboard. The demoboard based on one layer PCB and the layout is mentioned in Figure 28 Buck Demoboard Layout. The Line regulation is mentioned in Figure 30 Line Regulation. The Figure 31 shows efficiency of Buck LED Driver.
80 75 70 EFFICIENCY (%) 65 60 55 50 45 40 35 30 1 LED 100 mA 1 LED 350 mA 2 LED 350 mA 2 LED 100 mA
5
10
15
20
25
30
35
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
Figure 30. Line Regulation
Figure 31. Efficiency of Buck LED Driver
Table 6. TEST RESULTS
Line Regulation Output Ripple Efficiency Vin = 8 V to 20 V, Vout = 3.2 V, Iout = 350 mA Vin = 8 V to 20 V, Vout = 3.2 V, Iout = 350 mA Vin = 12 V, Vout = 3.2 V, Iout = 350 mA 19 mA 32 mA 62%
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16
NCP3066, NCV3066
R ON/OFF 10k
IC1
Rsense
R15
ON/OFF
SWC
Ipk NCP3066 VIN
+
SWE
VCC
CT
COMP
GND
Figure 32. ONOFF Serial Resistor Connection
If the application allows ON/OFF pin to be biased by voltage and the power supply is not connected to Vcc pin at the same time, then it is recommended to limit ON/OFF current by resistor with value 10 kW to protect the NCP3066 device. This situation is mentioned in Figure 32, ON/OFF Serial Resistor Connection.
ORDERING INFORMATION
Device NCP3066MNTXG NCP3066PG NCP3066DR2G NCV3066MNTXG NCV3066PG NCV3066DR2G
This resistor shifts the ON/OFF threshold by about 200 mV to higher value, but the TTL logic compatibility is kept in full range of input voltage and operating temperature range.
Package DFN-8 (Pb-Free) PDIP-8 (Pb-Free) SOIC-8 (Pb-Free) DFN-8 (Pb-Free) PDIP-8 (Pb-Free) SOIC-8 (Pb-Free)
Shipping 4000 / Tape & Reel 50 Units / Rail 2500 / Tape & Reel 4000 / Tape & Reel 50 Units / Rail 2500 / Tape & Reel
For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D.
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17
NCP3066, NCV3066
PACKAGE DIMENSIONS
8 LEAD PDIP CASE 626-05 ISSUE L
8 5
-B-
1 4
NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC --10_ 0.76 1.01 AC IN DC + IN DC - IN AC IN GROUND OUTPUT AUXILIARY VCC INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC --10_ 0.030 0.040
F
NOTE 2
-A-
L
C -T-
SEATING PLANE
J N D K
M
M TA B
H
G 0.13 (0.005)
M M
STYLE 1: PIN 1. 2. 3. 4. 5. 6. 7. 8.
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18
NCP3066, NCV3066
PACKAGE DIMENSIONS
SOIC-8 NB CASE 751-07 ISSUE AJ
-X- A
8 5
B
1
S
4
0.25 (0.010)
M
Y
M
-Y- G
K
NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D DIMENSION AT MAXIMUM MATERIAL CONDITION. 6. 751-01 THRU 751-06 ARE OBSOLETE. NEW STANDARD IS 751-07. DIM A B C D G H J K M N S MILLIMETERS MIN MAX 4.80 5.00 3.80 4.00 1.35 1.75 0.33 0.51 1.27 BSC 0.10 0.25 0.19 0.25 0.40 1.27 0_ 8_ 0.25 0.50 5.80 6.20 INCHES MIN MAX 0.189 0.197 0.150 0.157 0.053 0.069 0.013 0.020 0.050 BSC 0.004 0.010 0.007 0.010 0.016 0.050 0_ 8_ 0.010 0.020 0.228 0.244
C -Z- H D 0.25 (0.010)
M SEATING PLANE
N
X 45 _
0.10 (0.004)
M
J
ZY
S
X
S
SOLDERING FOOTPRINT*
1.52 0.060
7.0 0.275
4.0 0.155
0.6 0.024
1.270 0.050
SCALE 6:1 mm inches
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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19
NCP3066, NCV3066
PACKAGE DIMENSIONS
8 PIN DFN, 4x4 CASE 488AF-01 ISSUE C
D A B L1
PIN ONE REFERENCE 2X 2X
L
L
E
DETAIL A
OPTIONAL CONSTRUCTIONS
0.15 C 0.15 C
NOTES: 1. DIMENSIONS AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.15 AND 0.30MM FROM TERMINAL TIP. 4. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. 5. DETAILS A AND B SHOW OPTIONAL CONSTRUCTIONS FOR TERMINALS. DIM A A1 A3 b D D2 E E2 e K L L1 MILLIMETERS MIN MAX 0.80 1.00 0.00 0.05 0.20 REF 0.25 0.35 4.00 BSC 1.91 2.21 4.00 BSC 2.09 2.39 0.80 BSC 0.20 --- 0.30 0.50 --- 0.15
0.10 C
8X
DETAIL B
A A1 C
SEATING PLANE
0.08 C
NOTE 4
(A3)
SIDE VIEW D2
DETAIL A
K e
BOTTOM VIEW 0.80 PITCH
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81-3-5773-3850 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative
CC CCC CC CCC
1
8X 4
L
E2 4.30 2.39 0.10 C A B 0.05 C
NOTE 3 8X PACKAGE OUTLINE
8
5
8X
b
CC EEE EE CCC EE CCC
A1 DETAIL B
ALTERNATE CONSTRUCTIONS
CCC C
EE EE EE
TOP VIEW
EXPOSED Cu
MOLD CMPD
A3
SOLDERING FOOTPRINT*
2.21 0.63
8X
0.35
DIMENSIONS: MILLIMETERS
*For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D.
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20
NCP3066/D

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