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| NJU6080 CONSTANT CURRENT LED DRIVER with PWM CONTROL GENERAL DESCRIPTION The NJU6080 is a constant current LED driver with PWM control. NJU6080 can reduce board density compared with the case composed discrete because the constant current value can be set with one resistance. It can contribute to the reliability improvement of the system because it has an over current protection circuit and thermal shutdown circuit. The NJU6080 is suited for a LCD back light and toys, etc. PACKAGE OUTLINE NJU6080F1 FEATURES Supply Voltage Range : 2.5V ~ 5.5V LED Output Current : 100mA ( max. ) Output Current Accuracy : 1.8% Operating Current : 150A ( typ. ) One white LED can be lit. External Parts : Current limitation resistance Internal Thermal Overload Protection Internal Over Current Protection CMOS Technology Package Outline : SOT-23-6 BLOCK DIAGRAM VDD NJU6080 VREF ( 0.2V ) RS Current Limit / Thermal Shut Down Control Logic LED GND EN PWM PIN CONFIGRATION 6 5 4 NJU6080 1 2 3 1. PWM 2. GND 3. RS 4. LED 5. EN 6. VDD Ver.2010-06-25 -1- NJU6080 ABSOLUTE MAXIMUM RATINGS ( Ta = 25C ) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD - 0.3 ~ + 7.0 V Output Voltage VLED - 0.3 ~ + 7.0 V Output Current ILED 200 mA EN Pin Voltage VEN + 7.0 ( *1 ) V PWM Pin Voltage VPWM + 7.0 ( *1 ) V Power Dissipation PD 400 ( *2 ) MW Operating Temperature Topr - 40 ~ + 85 C Storage Temperature Tstg - 40 ~ + 125 C (*1) : When input voltage is less than +7V, the absolute maximum control voltage is equal to the input voltage. (*2) : Mounted on glass epoxy board ( 76.2 x 114.3 x 1.6mm: 2Layers FR-4 ) RECOMMENDED OPERATING CONDITION PARAMETER Supply Voltage Output Voltage SYMBOL VDD VLED CONDITIONS MIN. 2.5 TYP. ( Ta = 25C ) MAX. UNIT 5.5 V 5.5 V ELECTRICAL CHARACTERISTICS PARAMETER Quiescent Current Quiescent Current at OFF Output Current Accuracy Output Pin Voltage 1 Output Pin Voltage 2 Output Pin Leak Current 1 Output Pin Leak Current 2 EN Pin ON Voltage EN Pin OFF Voltage PWM Pin ON Voltage PWM Pin OFF Voltage EN Pin Input Current PWM Pin Input Current RS Pin Leak Current PWM Pin ON Delay Time PWM Pin OFF Delay Time Maximum Output Current ( VDD = 3.0V, VLED = 0.5V, RS = 10, VEN = VPWM = VDD, Ta = 25C ) SYMBOL CONDITIONS MIN. TYP. MAX. UNIT IDD 150 260 A IDD_OFF VEN = GND 0.1 A ILED - 1.8 + 1.8 % VLED1 ILED = 20mA 0.3 0.4 V VLED2 ILED = 100mA 0.4 0.5 V ILEAK1 VEN = GND, VDD = VLED = 5.5V 0.1 A ILEAK2 VPWM = GND, VDD = VLED = 5.5V 0.1 A VEN_ON ILED = OFF ON 1.6 VDD V VEN_OFF ILED = ON OFF 0 0.3 V VPWM_ON ILED = OFF ON 0.7VDD VDD V VPWM_OFF ILED = ON OFF 0 0.3VDD V IEN 0.1 A IPWM 0.1 A ILEAK_RS VEN = GND, VRS = VLED = 3V 0.1 A tPWM_ON VPWM = L H 2.5 s tPWM_OFF VPWM = H L 0.1 s ILED_MAX RS = 0 100 200 mA -2- Ver.2010-06-25 NJU6080 APPLYCATION CIRCUIT VLED Output Current Wave at PWM Dimming ILED VDD NJU6080 VREF ( 0.2V ) RS Current Limit / Thermal Shut Down Control Logic Current Sence Resistor VDD 0 LED ILED ILED = 0.2 / RS GND EN PWM Control signal at PWM Dimming H : Active L : Standby H : LED ON L : LED OFF Ver.2010-06-25 -3- NJU6080 TYPICAL CHARACTERISTICS Supply Voltage vs. Quiescent Current 300 0.1 Supply Voltage vs. Quiescent Current at OFF Quiescent Current at OFF : IDD_OFF ( nA ) 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 VLED = 0.5V RS = 10 EN = GND PWM = VDD Ta = 25C 250 Quiescent Current : IDD ( A ) VLED = 0.5V RS = 10 EN = PWM = VDD Ta = 25C 200 150 100 50 0 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 Supply Voltage : VDD ( V ) Supply Voltage : VDD ( V ) Output Voltage vs. Output Pin Leak Current1 0.3 VDD = 5.5V RS = 10 EN = GND PWM = VDD 0.3 Output Voltage vs. Output Pin Leak Current2 VDD = 5.5V RS = 10 EN = VDD PWM = GND Output PinLeak Current2 : ILEAK2 ( nA ) 2 3 4 5 6 7 Output Pin Leak Current1 : ILEAK( nA ) 0.25 0.25 0.2 0.2 0.15 0.15 0.1 0.1 0.05 0.05 0 0 1 0 0 1 2 3 4 5 6 7 Output Voltage : VLED ( V ) Output Voltage : VLED ( V ) RS Pin Voltage vs. RS Pin Leak Current 0.5 350 Output Voltage vs. Muximum Output Current Muximum Output Current : ILED_MAX (mA RS=0 EN=PWM=VDD VLED 4w ire Ta = 25C 0.45 RS Pin Leak Current : ILEAK_RS ( nA ) 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 VLED = 3.0V RS = OPEN PWM = EN = VDD = 3.0V Ta = 25C 300 250 200 150 100 VDD=2.5V 50 VDD=3V VDD=5.5V 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 RS Pin Voltage : VRS ( V ) Output Voltage : VLED ( V ) -4- Ver.2010-06-25 NJU6080 TYPICAL CHARACTERISTICS Quiescient Current vs. Temperature 300 1 Quiescient Current at OFF vs. Temperature 250 Quiescient Current at OFF : IDD_OFF ( A ) 0.1 Quiescient Current : IDD ( A ) 200 0.01 150 0.001 100 0.0001 50 VDD=2.5V VDD=3V VDD=7V 0.00001 VDD=2.5V VDD=3.0V VDD=7.0V 0 -50 0 50 100 150 0.000001 -50 0 50 100 150 Temperature : Ta ( C ) Temperature : Ta ( C ) Output Leak Current 1 vs. Temperature 1000 1000 Output Leak Current 2 vs. Temperature Output Leak Current 1 : ILEAK ( nA ) 100 Output Leak Current 2 : ILEAK 2 ( nA ) 100 10 10 1 1 0.1 VLED=0.5V VLED=1V VLED=3V VLED=7V 0.1 VLED=0.5V VLED=1V VLED=3V VLED=7V 0.01 -50 0 50 100 150 0.01 -50 0 50 100 150 Temperature : Ta ( C ) Temperature : Ta ( C ) EN Pin ON Voltage vs. Temperature 1.05 VDD=2.5V 1 EN_ON ( V ) EN Pin ON Voltage : V EN Pin OFF Voltage vs. Temperature 1.05 VDD=2.5V 1 EN_OFF ( V ) EN Pin OFF Voltage : V VDD=3V VDD=7V VDD=3V VDD=7V 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 -50 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0.6 -50 0 50 100 150 0 50 100 150 Temperature : Ta ( C ) Temperature : Ta ( C ) Ver.2010-06-25 -5- NJU6080 TYPICAL CHARACTERISTICS PWM ON Voltage vs. Temperature 4 4 PWM OFF Voltage vs. Temperature 3.5 PWM_ON ( V ) PWM ON Voltage : V 3.5 PWM OFF Voltage : VPWM_OFF ( V ) VDD=2.5V VDD=3V VDD=7V 3 3 2.5 2.5 2 2 1.5 1.5 1 1 VDD=2.5V VDD=3V VDD=7V 0.5 0.5 0 -50 0 50 100 150 0 -50 0 50 100 150 Temperature : Ta ( C ) Temperature : Ta ( C ) Muximum Output Current vs. Temperature 300 L Muximum Output Current : I ED_MAX ( mA ) Muximum Output Current vs. Temperature 300 L Muximum Output Current : I ED_MAX ( mA ) 250 250 200 200 150 150 100 VDD=2.5V 50 VDD=3V VDD=5.5V VDD=7V 0 -50 100 VDD=2.5V 50 VDD=3V VDD=5.5V VDD=7V 0 -50 0 50 100 150 0 50 100 150 Temperature : Ta ( C ) Temperature : Ta ( C ) Supply Voltage vs. Output Current vs. Temperature 20.5 20.4 20.3 Ta=-50 Ta=25 Ta=125 20.3 20.5 20.4 Output Current vs. Temperature VDD=2.5V VDD=3V VDD=7V Output Current : ILED ( mA ) Output Current : ILED ( mA ) 0 1 2 3 4 5 6 7 20.2 20.1 20 19.9 19.8 19.7 19.6 19.5 20.2 20.1 20 19.9 19.8 19.7 19.6 19.5 -50 0 50 100 150 Supply Voltage : VDD ( V ) Temperature : Ta ( C ) -6- Ver.2010-06-25 NJU6080 TYPICAL CHARACTERISTICS Output Voltage vs. Output Current vs. Temperature 22 20.5 20.4 VLED=0.3V 20.3 VLED=0.4V VLED=0.5V 20.2 20.1 20 19.9 19.8 19.7 19.6 19.5 -50 Output Current vs. Temperature 21.5 20.5 20 19.5 Ta=-50 19 Ta=25 Ta=125 18.5 18 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Output Current : ILED ( mA ) Output Current : ILED ( mA ) 21 0 50 100 150 Output Voltage : VLED ( V ) Temperature : Ta ( C ) PWM_ON Delay Time vs. Temperature 8 VDD=2.5V PWM_ON ( s ) PWM_ON Delay Time : T PWM_OFF Delay Time vs. Temperature 0.1 0.09 7 VDD=5.5V 6 VDD=7V PWM_OFF Delay Time : TPWM_OFF ( s ) VDD=3V VDD=2.5V 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 -50 VDD=3V VDD=5.5V VDD=7V 5 4 3 2 1 0 -50 0 50 100 150 0 50 100 150 Temperature : Ta ( C ) Temperature : Ta ( C ) Ver.2010-06-25 -7- NJU6080 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. -8- Ver.2010-06-25 |
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