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參數資料
| 型號： | FA7701V |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | For Switching Power Supply Control |
| 中文描述： | 對于開關電源控制 |
| 文件頁數： | 1/13頁 |
| 文件大小： | 182K |
| 代理商： | FA7701V |
1
I
Block diagram
FA7700V
FA7701V
FA7700V, FA7701V
I
Dimensions, mm
TSSOP-8
±
0
4
±
0
6
1
±
0.3
3.1
±
0
0
±
0
0
1
±
0.1
0.22
±
0.2
0.5
0.65
0.575 typ
I
Description
FA7700V/FA7701V are the PWM type DC to DC converter
control ICs with 1ch output that can directly drive power
MOSFETs. CMOS devices with high breakdown voltage are
used in these ICs and low power consumption is achieved.
These ICs have not only the functions equivalent to those of
FA76XX series but also the functions of directly driving Nch/Pch
MOSFETs, lower power consumption, higher frequency
operation, and less external components.
I
Features
Wide range of supply voltage: V
CC
=2.5 to 20V
FA7700V: For boost, flyback converter
(Maximum output duty cycle is 80%)
FA7701V: For buck converter
(Maximum output duty cycle is 100%)
Output stage consist of CMOS push-pull circuit, and achieves
a high speed switching of external MOSFETs. (FA7700V: For
Nch-MOSFET driving, FA7701V: For Pch-MOSFET driving)
High accuracy reference voltage (Error amplifier): 0.88V
±
2%
Soft start function
Adjustable built-in timer latch for short-circuit protection
Output ON/OFF control function
Less external discrete components needed (2 components
less than conventional version of the equivalent products)
Low power consumption
Stand-by current: 40
μ
A typ.
Operating current: 1.2mA typ. (Including error amplifier output
current and oscillator current)
High frequency operation: 50kHz to 1MHz
Package: TSSOP-8, thin and small
Pin No. Pin symbol Description
1
RT
Oscillator timing resistor
2
REF
Internal bias voltage
3
IN (–)
Error amplifier inverting input
4
FB
Error amplifier output
5
GND
Ground
6
OUT
Output for driving switching device
7
VCC
Power supply
8
CS
ON/OFF, soft start, timer latched short
circuit protection
RT
REF
VREF
OSC
BIAS
U V L O
5.5V
–
+
OFF
4
FB
IN
–
+
P W M
–
+
+
–
+
S.C.P
ON/OFF
S.C.DET
0.3V
1.5V
1.5V
–
2.2V
+
VREF
2.2V
Power Good Signal
ON/OFF
1
2
3
8
7
6
5
CS
VCC
OUT
GND
–
+
0.88V
E R . A M P
+
–
+
P W M
–
+
E R . A M P
ON/OFF
V R E F
OSC
BIAS
U V L O
5.5V
–
+
–
+
ON/OFF
S.C.DET
0.3V
1.5V
1.5V
–
2.2V
+
S.C.P
OFF
RT
REF
4
FB
IN
–
1
2
3
8
7
6
5
CS
VCC
OUT
GND
0.88V
Power Good Signal
VREF
2.2V
CMOS IC
For Switching Power Supply Control
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