uc3842a-s08-t Unisonic Technologies, uc3842a-s08-t Datasheet - Page 2

• Manufacturer Part Number: uc3842a-s08-t
• Description: Pwm Controllers With Low Start-up Current
• Manufacturer: Unisonic Technologies

UC3842A/3843A
CURRENT SENSE
BLOCK DIAGRAM
PIN CONFIGURATION
COMP
RT/CT
V
VFB
REF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
8
2
1
3
4
Internal
Bias
Current Sense
1/2V
AMPLIFIER
ERROR
RT/CT
COMP
REF
V
FB
1
2
3
4
5V REF
Good
Logic
V
REF
1/3V
OSCILLATOR
S/R
REF
1V
COMPARATOR
LINEAR INTEGRATED CIRCUIT
CURRENT
8
7
6
5
SENSE
V
Output
GND
V
REF
CC
U.V.L.O
LATCH
R
S
PWM
QW-R103-002,D
7
5
7
6
5
GND
OUTPUT
GND
2 of 9
Vcc
Vcc