View FA3629AV_165352.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

FA3629AV
s Description
FA3629AV is a Power IC which includes DC-DC converter controller and Nch-power MOSFET. This IC can directly drive Nch/Pch MOSFET. This IC is suitable to reduce converter size because it has many functions in a small package TSSOP.
CMOS IC For Switching Power Supply Control FA3629AV
s Dimensions, mm TSSOP-16
16 9
s Features
* Low input voltage: 2.5V to 6.5V * 40V CDMOS Process: Built-in 0.3 Nch-Power MOSFET(ch1, open drain) * 3-channels PWM Control: 2 boost circuits(ch1, ch2), 1 inverting circuit (ch3) * Adjustable soft start time and maximum duty cycle * Built-in timer latch for short circuit protection: Delay time = 216 / (switching frequency) * Built-in protection functions: Overcurrent limit for MOSFET, overheat protection, undervoltage lockout * Wide range of operation frequency: 100kHz to 1MHz * Package: TSSOP-16(Thin and small)
4.4 6.40.1 5.2 0.070.05 1 8
0.17+0.02 -0.04
0~8
0.50.08
0.20.05
0.65
s Applications
* Power supply for general equipment
s Block diagram
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin symbol Description Ch.1 output of error amplifier Ch.1 inverting input to error amplifier Ch. 2 inverting input to error amplifier Ground of control blocks Ground of large power blocks Ch. 2 output of error amplifier Ch. 3 inverting input to error amplifier Ch. 3 output of error amplifier Ch. 3 output (for Pch-MOSFET) Ch. 2 output (for Nch-MOSFET) Power supply Ch.1 drain output of internal Nch-MOSFET Regulated voltage output Oscillator timing capacitor Soft start for Ch. 3 Soft start for Ch.1 and Ch. 2
FB1 IN1- IN2- GND PGND FB2 IN3- FB3 OUT3 OUT2 VCC OUT1 REG CT CS3 CS
1.1max
1
FA3629AV
s Absolute maximum ratings
Item Power supply voltage Symbol Rating 6.5 40 2.8 -400 400 -400 400 -50 50 -50 50 5.0 500 -25 to +95 125 -40 to +125 Unit V V A mA mA mA mA mA mA mA mA V mW C C C
s Recommended operating conditions
Item Power supply voltage Output voltage of OUT1 Output current of OUT1 Oscillation frequency Ambient temperature Symbol Min. 2.5 0 0 100 -20 Max. 5.8 32 1.8 1000 85 Unit V V A kHz C
VCC Output voltage at OUT1 pin VOUT1 Output current at OUT1 pin*1 IOUT1 Source peak current of OUT2 IOUT2+
Sink peak current of OUT2 IOUT2-
VCC VOUT1 IOUT1 fOSC TOPR
IOUT3+ Sink peak current of OUT3 IOUT3Source average current of OUT2 IOUT2+ Sink average current of OUT2 IOUT2Source peak current of OUT3 Source average current of OUT3 IOUT3+ Sink average current of OUT3 IOUT3Input voltage to err. amp. Total power dissipation*2 Ambient temperature Junction temperature Storage temperature
VEI Pd TOPR TJ TSTG
*1 Output current is limited by the overcurrent protection *2 Ta < 25C
s Electrical characteristics (VCC=3.0V, Ta=25C) Reference voltage section
Item Reference voltage Variation with supply voltage Variation with temperature Symbol Test condition Min. 0.98 Typ. 1.00 1 0.5 0.5 Max. 1.02 3 1.2 1.2 Unit V mV % %
VREF VREF-LINE VREF-TC1 VREF-TC2
VCC=2.5 to 5.8V
Ta=-20 to +25C Ta=+25 to +85C
Regulated voltage for internal control blocks
Item Regulated voltage Variation with supply voltage Variation with temperature Symbol Test condition Min. 2.16 Typ. 2.20 3 0.5 0.7 -40 Max. 2.24 8 1.5 1.5 -15 Unit V mV % % mA
VREG VREG-LINE VREG-TC1 VREG-TC2 IREG
CO=0.1F VCC=2.5 to 5.8V
Ta=-20 to +25C Ta=+25 to +85C
Source current
Oscillator section
Item Oscillation frequency High level voltage Low level voltage Variation with supply voltage Variation with temperature Symbol Test condition Min. 480 Typ. 550 1.38 0.78 1 5 5 2 7 7 Max. 620 Unit kHz V V % % %
fOSC VOSCH VOSCL fdv fdT1 fdT2
CT=150pF CT=150pF CT=150pF VCC=2.5 to 5.8V
Ta=-20 to +25C Ta=+25 to +85C
2
FA3629AV
Soft-start and duty section
Item Charge current of CS (Source) Charge current of CS3 (Sink) Max. duty cycle of OUT1 & OUT2 Max. duty cycle of OUT3 Invalid TL threshold voltage of CS Invalid TL threshold voltage of CS3 Symbol Test condition Min. -1.2 0.8 Typ. -1.0 1.0 87 86 0.52 1.68 Max. -0.8 1.2 90 90 0.62 1.78 Unit A A % % V V
ICS ICS3 Dmax Dmax3 VCSLO VCSHI
fOSC=500kHz fOSC=500kHz
80 80 0.42 1.58
Timer latch section (TL)
Item Threshold voltage of FB1 (Ch.1) Threshold voltage of FB2 (Ch. 2) Threshold voltage of FB3 (Ch. 3) Start up count Start up time Symbol Test condition Min. 1.58 1.58 0.42 - Typ. 1.68 1.68 0.52 216 119 Max. 1.78 1.78 0.62 - 137 Unit V V V counts ms
VTLTH1 VTLTH2 VTLTH3
count
TTL
CT=150pF
105
Error amplifier section
Item Input offset voltage Common mode input voltage range DC open loop gain Unity gain band width Sink current (Ch.1) Source current (Ch.1) Sink current (Ch. 2) Source current (Ch. 2) Sink current (Ch. 3) Source current (Ch. 3) Sink current variation with temperature Symbol Test condition Min. 0.2 70 1.0 75 1.7 1.5 -120 0.7 -120 1.5 -120 Typ. Max. 10 1.5 80 2.0 2.0 -80 0.9 -80 2.0 -80 20 20 20 20 Unit mV V dB MHz mA A mA A mA A % % % %
VIO VCOM AVO fT IOL1 IOH1 IOL2 IOH2 IOL3 IOH3 IOL-TC1 IOL-TC2 IOH-TC1 IOH-TC2
VFB1=0.5V VFB1=VREG -0.5V VFB2=0.5V VFB2=VREG -0.5V VFB3=0.5V VFB3=VREG -0.5V
Ta=-20 to +25C Ta=+25 to +85C Ta=-20 to +25C Ta=+25 to +85C
1.0 -160 0.5 -160 1.0 -160
Source current variation with temperature
Overcurrent protection section (OCP)
Item Threshold current Delay time Symbol Test condition Min. 1.4 1.8 100 Typ. 1.8 2.0 200 Max. 2.0 2.2 400 Unit A A ns
IOCDTH fOCD
VCC=3.0V VCC=5.0V
Overheat protection section (OHP)
Item Threshold temperature Symbol Test condition Min. 125 Typ. 135 Max. 145 Unit C
TOH
Undervoltage lockout circuit section (UVLO)
Item Threshold voltage of REG Symbol Test condition Min. 1.95 Typ. 2.05 Max. 2.15 Unit V
VUVTH
3
FA3629AV
Output section (OUT1)
Item On resistance of MOSFET Rise time of OUT1 Fall time of OUT1 Symbol Test condition Min. 0.25 Typ. 0.275 25 25 Max. 0.3 35 35 Unit ns ns
RON1 tr tf
VCC=3.0V, IO1=200mA VCC=3.0V VOUT1=10V, IO1=1.0A
Output section (OUT2, OUT3)
Item Rise time of OUT2 Fall time of OUT2 Rise time of OUT3 Fall time of OUT3 High level on resistance of OUT2 Low level on resistance of OUT2 High level on resistance of OUT3 Low level on resistance of OUT3 High level on resistance of OUT2 Low level on resistance of OUT2 High level on resistance of OUT3 Low level on resistance of OUT3 Symbol Test condition Min. 20 20 20 20 2.5 2.5 2.5 2.5 2.0 2.0 2.0 2.0 Typ. 25 25 25 25 4.0 4.0 4.0 4.0 3.5 3.5 3.5 3.5 Max. 35 35 35 35 5.5 5.5 5.5 5.5 5.0 5.0 5.0 5.0 Unit ns ns ns ns
tr2 tf2 tr3 tf3 R2AH R2AL R3AH R3AL R2AH R2AL R3AH R3AL
VCC=3V, CO2=1000pF
(Between OUT2-GND)
VCC=3V, CO3=1000pF
(Between VCC-OUT3)
VCC=3V, IOUT2=-150mA VCC=3V, IOUT2=150mA VCC=3V, IOUT3=-150mA VCC=3V, IOUT3=150mA VCC=5V, IOUT2=-150mA VCC=5V, IOUT2=150mA VCC=5V, IOUT3=-150mA VCC=5V, IOUT3=150mA
Overall device
Item Operating current (Overall) Operating current of control blocks Symbol Test condition D=50%, fOSC=500kHz Min. Typ. 3.0 1.8 Max. 3.8 Unit mA mA
ICCA ICTRL
4
FA3629AV
s Characteristic curves (Ta=25C)
Supply current (ICC) vs oscillation frequency (fOSC) Oscillation frequency (fOSC) vs. timing capactior(CT)
VCC=6.0V 6 1000
VCC=5.0V
ICC [mA]
4 VCC=3.0V
VCC=2.5V 2
0
200k
500k
800k
fosc [kHZ]
100 1000
100
fosc [kHZ]
CT [pF]
Oscillation frequency (fOSC) vs. ambient temperature (Ta)
700
Max. on duty cycle vs. oscillation frequency (fOSC)
100
650
Maximum on duty cycle [%]
600
90
fosc [kHz]
550
CH.1, 2 80 CH. 3
500
450
400
25
0
25
50
75
100
70
100
500
1000
Ta [C]
fosc [kHz]
Oscillation peak voltage vs. timing capactior(CT)
Error amplifier voltage gain (Av) /phase vs. frequency (f)
Condition: Open loop
2
100 90 80 Maximum peak voltage 70 60 Av 150 120 180
Voltage [V]
AV [dB]
50 40 30 20 10 0 - 10 - 20 Phase
1
Minimum peak voltage
60 30 0 - 30 - 60 10M
0
100
500
1000
- 30 100
1K
10K
100K
1M
CT [pF]
f [HZ]
Phase [deg]
90
5
FA3629AV
Output (Ch. 2) duty cycle vs FB terminal voltage (VFB)
100 fOSC=150kHZ 90 fOSC=550kHZ 90
Output (Ch. 3) duty cycle vs. FB3 terminal voltage (VFB3)
100 fOSC=150kHZ
Output (CH. 2) duty cycle [%]
80 70 60 50 40 30 20 10 0 0.5 0.7 0.9 1.1 1.3 1.5 fOSC=800kHZ
Output (CH. 3) duty cycle [%]
80 70 60 50 40 30 20 10 0 0.5 0.7 0.9 fOSC=800kHZ
fOSC=550kHZ
1.1
1.3
1.5
FB [V]
FB3 [V]
H-level output voltage (VOH) vs output source current (ISO)
OUT2, OUT3
L-level output voltage (VOL) vs. output sink current (ISI)
OUT2, OUT3
4.0 VCC=5.0V
4.0
VCC=5.0V
VCC- VOH [V]
2.0 VCC=3.0V
VOL [V]
2.0 VCC=3.0V
0 - 400 - 200 0
0 0 200 400
ISO [mA]
ISI [mA]
6
FA3629AV
s Application circuit
Parts tolerances characteristics are not defined in the circuit design sample shown above. When designing an actual circuit for a product, you must determine parts tolerances and characteristics for safe and economical operation.
7

▲Up To Search▲

Price & Availability of FA3629AV

	To Download FA3629AV Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .