CS3842BGD8 Datasheet
Off-Line Current Mode PWM Control Circuit Off-Line Current Mode PWM Control Circuit
Download: CS3842BGD8 Datasheet 
CS3842BGD8
Off-Line Current Mode PWM Control Circuit Off-Line Current Mode PWM Control Circuit
CS3842B/3843B
CS3842B/CS3843B
Off-Line Current Mode PWM Control Circuit with Very Low Start Up Current
Description
The CS384XB provides all the necessary
Features To Implement Off-line Fixed Frequency Current-mode Control With A Minimum Number Of
External Components. The Family Has Been Optimized For Very Low Start Up Current (300 A, Typ).
The Cs384xb Family Incorporates A Precision Temperature-controlled Oscillator With An Internally
Trimmed Discharge Current To Minimize Variations In Frequency. A Precision Duty-cycle Clamp
Eliminates The Need For An External Oscillator When A 50% Duty-cycle Is Used. Duty-cycles Of Almost
100% are
Possible. On Board Logic Ensures That Vref Is Stabilized Before The Output Stage Is Enabled.
Ion-implant resistors provide tighter control of undervoltage lockout.
Features Include Pulse-by-pulse Current Limiting, And A High-current Totem Pole Output For Driving
Capacitive Loads, Such As The Gate Of A Power Mosfet. The Output Is Low In The Off State, Consistent
with N-channel devices.
These Ics Are Available In 8 And 14 Lead Surface Mount (so) And 8 Lead Pdip Packages.
Absolute
MAXIMUM RATINGS
Block Diagram
VCC Gnd
VFB COMP Sense
Undervoltage Lock-out Circuit
Reset Reference
16V/10V (8.4V/7.6V)
REF 2.50V
Output Enable
Oscillator
Internal Bias
- Error
Amplifier
1 V Current Sense
CS3842BGD8 Datasheet
Current Mode PWM, 0.3mA Start-up Supply Current, SOIC
Download: CS3842BGD8 Datasheet
CS3842BGD8
Current Mode PWM, 0.3mA Start-up Supply Current, SOIC
CS3842B/3843B
CS3842B/CS3843B
Off-Line Current Mode PWM Control Circuit with Very Low Start Up Current
Description
The CS384XB provides all the necessary
Features To Implement Off-line Fixed Frequency Current-mode Control With A Minimum Number Of
External Components. The Family Has Been Optimized For Very Low Start Up Current (300 A, Typ).
The Cs384xb Family Incorporates A Precision Temperature-controlled Oscillator With An Internally
Trimmed Discharge Current To Minimize Variations In Frequency. A Precision Duty-cycle Clamp
Eliminates The Need For An External Oscillator When A 50% Duty-cycle Is Used. Duty-cycles Of Almost
100% are
Possible. On Board Logic Ensures That Vref Is Stabilized Before The Output Stage Is Enabled.
Ion-implant resistors provide tighter control of undervoltage lockout.
Features Include Pulse-by-pulse Current Limiting, And A High-current Totem Pole Output For Driving
Capacitive Loads, Such As The Gate Of A Power Mosfet. The Output Is Low In The Off State, Consistent
with N-channel devices.
These Ics Are Available In 8 And 14 Lead Surface Mount (so) And 8 Lead Pdip Packages.
Absolute
MAXIMUM RATINGS
Block Diagram
VCC Gnd
VFB COMP Sense
Undervoltage Lock-out Circuit
Reset Reference
16V/10V (8.4V/7.6V)
REF 2.50V
Output Enable
Oscillator
Internal Bias
- Error
Amplifier
1 V Current Sense