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FA7630CP [FUJI]

Bipolar IC For Switching Power Supply Control; 双极型集成电路开关电源控制
FA7630CP
型号： FA7630CP
厂家： FUJI ELECTRIC    FUJI ELECTRIC
描述：

Bipolar IC For Switching Power Supply Control
双极型集成电路开关电源控制

稳压器 开关式稳压器或控制器 电源电路 开关式控制器 光电二极管
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Bipolar IC  
For Switching Power Supply Control  
FA7630CP(E)  
■ Description  
■ Dimensions, mm  
The FA7630CP(E) is dual channel PWM-type switching power  
supply control IC.  
This IC can drive Pch-MOSFET directly and is optimum for  
large power DC-DC converter.  
Á SSOP-20  
11  
20  
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  
• Dual channel PWM-type switching power supply control  
• ±2.6% (VREF) and ±3% (VB) reference voltage  
• Low voltage operation (Vcc: 5 to 20V)  
• Drive circuit for connecting a Pch-MOSFET  
• Overload cutoff circuit with timer latch circuit  
• Soft start circuit  
10  
1
7.2  
0.6  
0.3  
0.65  
• Undervoltage lockout function (UVLO)  
• Pulse-by-pulse overcurrent limiting function  
• Output ON/OFF control function for each channel  
• Master-slave synchronized operation without external  
components  
Á DIP-20  
20  
11  
• Maximum operating frequency is 500kHz  
1
10  
1.52  
24.4  
0.77  
7.62  
2.54±0.25  
0.46±0.1  
0~15˚  
■ Block diagram  
Pin Pin  
Description  
No. symbol  
1
2
3
4
CT  
RT  
Oscillator timing capacitor  
Oscillator timing resistor  
ON/OFF2 Output ON/OFF control 2  
IN2+  
Non-inverting input to error  
amplifier  
5
IN2–  
FB2  
Inverting input to error amplifier  
Error amplifier output  
Dead time adjustment  
Overcurrent limiting circuit 2  
Ground  
6
7
DT2  
8
OCL2  
GND  
OUT2  
OUT1  
VCC  
OCL1  
DT1  
9
10  
11  
12  
13  
14  
15  
16  
CH.2 output  
CH.1 output  
Power supply  
Overcurrent limiting circuit  
Dead time adjustment  
Error amplifier output  
FB1  
IN1+  
Non-inverting input to error  
amplifier  
17  
18  
19  
20  
ON/OFF1 Output ON/OFF control 1  
SYNC IN Synchronizing signal input  
CP  
Timer and latch circuit  
REF  
Reference voltage output  
1
FA7630CP(E)  
■ Absolute maximum ratings  
■ Recommended operating conditions  
Item  
Symbol  
VCC  
IOUT  
Pd  
Rating  
22  
Unit  
V
Item  
Symbol  
VCC  
RNF  
CT  
Min. Max. Unit  
Maximum supply voltage  
Maximum output current  
Maximum power dissipation  
Junction temperature  
Operating temperature  
Storage temperature  
Supply voltage  
5
20  
V
±500  
mA  
mW  
°C  
Feedback resistance  
Oscillator timing capacitance  
Oscillator timing resistance  
Oscillation frequency  
100  
50  
24  
50  
kΩ  
650  
2200 pF  
TJ  
125  
RT  
100  
500  
kΩ  
Topr  
Tstg  
–20 to +85  
–40 to +150  
°C  
fOSC  
kHz  
°C  
■ Electrical characteristics (Ta=25°C, VCC=6V, CT=180pF, RT=47kΩ)  
Reference voltage section  
Item  
Symbol  
VREF  
Test condition  
IOR = 1mA  
Min.  
Typ.  
2.520  
5
Max.  
2.580  
20  
Unit  
Output voltage  
Line regulation  
2.450  
V
LINE  
VCC = 5.0 to 20V  
IOR=1mA  
mV  
Load regulation  
LOAD  
VTC1  
VTC2  
IOR = 0.1 to 1mA  
Ta = –20 to +25°C  
Ta = +25 to +85°C  
30  
50  
1
mV  
%
Output voltage variation due to temperature change  
–1  
–1  
1
%
Oscillation and synchronizing circuit section  
Item  
Symbol  
fOSC  
fdV  
Test condition  
Min.  
Typ.  
83  
1
Max.  
Unit  
kHz  
%
Oscillation frequency  
CT=180pF, RT=47kΩ  
VCC = 3.6 to 20V  
Ta = –20 to +85°C  
74  
92  
Frequency variation(due to supply voltage change)  
Frequency variation(due to temperature change)  
H level of synchronizing signal  
L level of synchronizing signal  
Cutoff level of synchronizing signal  
Bias current of synchronizing signal  
fdT  
5
%
VSYH  
VSYL  
VSD  
1.5  
0.8  
1.8  
1.1  
0.4  
5
V
V
V
ISYNC  
VSYNC=1.6V  
µA  
Error amplifier section (Ch.1)  
Item  
Symbol  
VB  
Test condition  
Min.  
Typ.  
0.793  
5
Max.  
0.817  
100  
Unit  
V
Reference voltage  
Input bias current  
Open-loop voltage gain  
Unity-gain bandwidth  
H state output voltage  
L state output voltage  
Output source current  
0.769  
IB  
nA  
dB  
MHz  
V
AVO  
fT  
60  
1
VOH  
VOL  
IOH  
No load  
No load  
VOH=1V  
2.10  
40  
300  
100  
mV  
µA  
55  
Error amplifier section (Ch.2)  
Item  
Symbol  
VIO  
Test condition  
Min.  
Typ.  
Max.  
10  
Unit  
mV  
nA  
V
Input offset voltage  
Input bias current  
2
5
IB  
100  
1.0  
Common-mode input voltage  
Open-loop voltage gain  
Unity-gain bandwidth  
H state output voltage  
L state output voltage  
Output source current  
VCOM  
AVO  
fT  
0
70  
dB  
MHz  
V
1.0  
65  
VOH  
VOL  
IOH  
No load  
No load  
VOH=1V  
2.10  
50  
300  
200  
mV  
µA  
2
FA7630CP(E)  
Pulse width modulation circuit section (FB pin)  
Item  
Symbol  
VTHO  
Test condition  
Duty cycle = 0%  
Duty cycle = 100%  
Min.  
Typ.  
1.65  
0.95  
Max.  
Max.  
Unit  
V
Input threshold voltage  
Input threshold voltage  
VTH1  
V
Dead time adjustment circuit section (DT pin)  
Item  
Symbol  
VTHO  
VTH1  
Test condition  
Duty cycle = 0%  
Duty cycle = 100%  
DT pin open  
Min.  
Typ.  
1.65  
0.95  
Unit  
V
Input threshold voltage  
Input threshold voltage  
Standby voltage  
V
VSTB  
1.80  
V
Overcurrent limiting circuit section  
Item  
Symbol  
VTHOC  
VHYOC  
IOC  
Test condition  
Min.  
Typ.  
200  
40  
Max.  
Unit  
mV  
mV  
µA  
Input threshold voltage  
Hysteresis voltage  
Input bias current  
Delay in OCL  
175  
225  
45  
80  
tdoc  
Overdriving : 50mV  
120  
ns  
Timer and latch circuit section  
Item  
Symbol  
VTHCP  
IINCP  
Test condition  
Min.  
Typ.  
Max.  
1.50  
1
Unit  
V
Latch-mode threshold voltage  
Input bias current  
CP pin voltage / LOW  
1.00  
1.25  
VCP=1.5V, VFB=0.3V  
µA  
mV  
VSATC  
ICP=20µA, VFB=1.0V  
300  
Output ON/OFF control section  
Item  
Symbol  
VTHON  
VTHOF  
IIN  
Test condition  
Min.  
Typ.  
Max.  
Unit  
V
OFF-to-ON threshold voltage  
ON-to-OFF threshold voltage  
Input bias current  
3.0  
0.60  
V
VIN=3V  
230  
350  
µA  
Undervoltage lock-out circuit section  
Item  
Symbol  
VCCON  
VCCOF  
VHYS  
Test condition  
Min.  
Typ.  
4.20  
3.50  
0.70  
Max.  
Unit  
V
OFF-to-ON threshold voltage  
ON-to-OFF threshold voltage  
Voltage hysteresis  
3.92  
4.48  
V
V
Output section  
Item  
Symbol  
VSAT+  
Test condition  
IO= –50mA  
IO= 50mA  
Min.  
Min.  
Typ.  
1.60  
1.40  
Max.  
2.00  
1.80  
Unit  
V
Saturation voltage(H level)  
Saturation voltage(L level)  
VSAT–  
V
Overall device  
Item  
Symbol  
ICCST  
ICC1  
Test condition  
Typ.  
0.1  
Max.  
10  
Unit  
µA  
Standby supply current  
Operating-state supply current  
Out pin open  
Single channel operation  
Duty cycle =50%  
Dual channel operation  
Duty cycle =50%  
2.20  
3.20  
mA  
ICC2  
3.00  
4.20  
mA  
3
FA7630CP(E)  
■ Application circuit  
Á Individual application circuit  
4
FA7630CP(E)  
Á Master-slave 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.  
5

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