CALLM FA7622CP, FA7622CE Datasheet
FA7622CP(E)
1
FA7622CP(E)
■ Dimensions, mm
Á SSOP-20
1
7.2
10
11
20
5.3
0.6
0~10˚
0.65
7.9
±0.3
0.1
±0.1
0.3
0.2
+
0
.1
–0
.05
2.1max
Á DIP-20
1
20
11
10
24.4
6.4
7.62
3.6
5.1max
1.52
0.77
2.54min
0.51min
0~15˚
0~15˚
0.46
±0.1
2.54
±0.25
0.25
+0.1
–0.05
Bipolar IC
For Switching Power Supply Control
■ Description
The FA7622CP(E) is a DC-DC converter IC that can directly
drive a power MOSFET. This IC has all the necessary
protection functions for a power MOSFET. It is optimum for a
portable equipment power supply which uses low-voltage input
to output comparably large power.
■ Features
• Drive circuit for connecting a power MOSFET
(Io = ±600mA)
• Built-in voltage step-up circuit to drive a power MOSFET
gate: A converter circuit requires only an N-channel power
MOSFET.
• Dual control circuit
• Overcurrent limiting circuit
• Overload cutoff circuit with timer and latch circuit
• ON/OFF control pin
• Wide operating range: 3.6 to 28V
• High-frequency operation: up to 1MHz
• 20-pin package (DIP/SSOP)
■ Applications
• Battery power supply for portable equipment
+
-
+
-
+
-
+
-
FB1
ON/OFF
19
17
IN1+
3
CP
IN2+
4
REF
DT1 CT RT VCC1 SW
20
16 1 2 14
13
BIAS
OSC
UVLO
Duty
limit
OCP
12
VCC2
15
OCL1
11
OUT1
PWM1
ER, AMP1
VB
ER, AMP2
PWM2
Duty
limit
OCP
10
OUT2
OCL2
8
GND
DT2
7
6
5
IN2-
FB2
-
Timer
&
latch
18
9
SW
Pin Pin Description
No. symbol
1 CT Oscillator timing capacitor
2 RT Oscillator timing resistor
3 CP Timer and latch circuit
4 IN2+ Non-inverting input to error
amplifier
5 IN2- Inverting input to error amplifier
6 FB2 Error amplifier output
7 DT2 Dead time adjustment
8 OCL2 Overcurrent limiting circuit 2
9 GND Ground
10 OUT2 CH.2 output
11 OUT1 CH.1 output
12 VCC2 Power supply 2
13 SW Switch for boost circuit
14 VCC1 Power supply 1
15 OCL1 Overcurrent limiting circuit 1
16 DT1 Dead time adjustment
17 FB1 Error amplifier output
18 IN1+ Non-inverting input to error
amplifier
19 ON/OFF Output ON/OFF control
20 REF Reference voltage output
■ Block diagram
FA7622CP(E)
2
■ Electrical characteristics (Ta = 25°C, VCC = 6V, RT = 36kΩ, CT = 180pF)
Reference voltage section
Item Symbol Test condition Min. Typ. Max. Unit
Output voltage VREF IOR = 1mA 2.400 2.475 2.550 V
Line regulation LINE
V
CC
= 3.6 to 26V, IOR = 1mA
515mV
Load regulation LOAD IOR = 0.1 to 1mA 2 mV
Output voltage variation due to temperature change VTC1 Ta = –30 to +25°C–1 1%
VTC2 Ta = +25 to +85°C–1 1%
Oscillator section
Item Symbol Test condition Min. Typ. Max. Unit
Oscillation frequency fOSC CT = 180pF, RT = 36kΩ 100 110 120 kHz
Frequency variation 1 (due to supply voltage change) fdV VCC = 3.6 to 26V 1 %
Frequency variation 2 (due to temperature change) fdT Ta = –30 to +25°C5%
Error amplifier section (ch. 1)
Item Symbol Test condition Min. Typ. Max. Unit
Reference voltage VB 0.832 0.858 0.884 V
Input bias current IB 5 100 nA
Open-loop voltage gain AVO 40 dB
Unity-gain bandwidth fT 1.0 MHz
Maximum output voltage VOH No load 1.8 V
VOL No load 300 mV
Output source current IOH VOH = 0V 30 60 90
µ
A
Error amplifier section (ch. 2)
Item Symbol Test condition Min. Typ. Max. Unit
Input offset voltage VIO 210mV
Input bias current IB 5 100 nA
Common-mode input voltage VCOM 0 1.0 V
Open-loop voltage gain AVO 70 dB
Unity-gain bandwidth fT 1.0 MHz
Maximum output voltage VOH No load 1.8 V
VOL No load 300 mV
Output source current IOH VOH = 0V 40 80 120
µ
A
■ Absolute maximum ratings
Item Symbol Rating Unit
Supply VCC1 28 V
voltage
VCC1 20 V
Supply voltage VCC2 28 V
ON/OFF pin voltage VON/OFF –0.3 to +7 V
Out pin output current IOUT ±600 mA
Total power dissipation Pd 650 mW
Junction temperature Tj 125 °C
Operating temperature Topr –30 to +85 °C
Storage temperature Tstg –40 to +150 °C
Voltage boost
circuit not used
Voltage boost
circuit used
■ Recommended operating conditions
Item Symbol Min. Max. Unit
VCC1 3.6 26 V
VCC1 3.6 18 V
RNF 100 kΩ
CT 50 2200 pF
RT 24 100 kΩ
fOSC 50 1000 kHz
Supply
voltage
Feedback resistance
Timing capacitance
Timing resistance
Oscillation frequency
Voltage boost
circuit not used
Voltage boost
circuit used
FA7622CP(E)
3
Pulse width modulation circuit section ( FB1, FB2 pin )
Item Symbol Test condition Min. Typ. Max. Unit
Input threshold voltage VTHO Duty cycle = 0% 1.6 1.8 V
Input threshold voltage VTHI Duty cycle = 100% 0.8 1.0 V
Dead time adjustment circuit section ( DT1, DT2 pin )
Item Symbol Test condition Min. Typ. Max. Unit
Input threshold voltage VTH0 Duty cycle = 0% 1.6 1.8 V
Input threshold voltage VTH1 Duty cycle = 100% 0.8 1.0 V
Standby voltage VSTR DT1, DT2 pin open 1.8 V
Overcurrent limiting circuit section
Item Symbol Test condition Min. Typ. Max. Unit
Input threshold voltage VTHOC 180 210 240 mV
Hysteresis voltage VHYOC 40 mV
Input bias current IOC 50 100
µ
A
Delay in OCL tdoc Overdriving: 50mV 120 ns
Timer and latch circuit section
Item Symbol Test condition Min. Typ. Max. Unit
Latch-mode threshold voltage VTHCP 1.00 1.25 1.50 V
Input bias current IINCP VCP = 1.5V, VFB = 0.3V 1
µ
A
CP pin voltage / LOW VSATC ICP = 20 µA, VFB = 1.0V 300 mV
Output ON/OFF control circuit section
Item Symbol Test condition Min. Typ. Max. Unit
OFF-to-ON threshold voltage VTHON 3.0 V
ON-to-OFF threshold voltage VTH OFF 0.60 V
Input bias current IIN VIN = 3V 180
µ
A
Undervoltage lock-out circuit section
Item Symbol Test condition Min. Typ. Max. Unit
OFF-to-ON threshold voltage VCCON 2.80 3.00 3.20 V
ON-to-OFF threshold voltage VCCOF 2.90 V
Voltage hysteresis VHYS 0.10 V
Output section
Item Symbol Test condition Min. Typ. Max. Unit
Saturation voltage (H level) VSAT+ IO = –50mA 1.50 2.00 V
Saturation voltage (L level) VSAT–
I
O
= 50mA
1.70 2.20 V
Voltage step-up circuit section
Item Symbol Test condition Min. Typ. Max. Unit
Output voltage VOUP L=330µH, C=1µF, No load 10.5 12.5 14.0 V
Overall device
Item Symbol Test condition Min. Typ. Max. Unit
Stand-by supply current ICCST Out pin open 0.1 10
µ
A
Operating VCC1 current ICC1 Normal operation 3.8 5.5 mA
Operating VCC2 current ICC2 Normal operation VCC2=12V 1.5 2.2 mA
OUT1, OUT2 open
Duty cycle=50%
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