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TS3842BCS

Description
High Performance Current Mode Controller
File Size372KB,20 Pages
ManufacturerETC
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TS3842BCS Overview

High Performance Current Mode Controller

TS3842B/3843B
High Performance Current Mode Controller
Designed for Off-Line and DC-to-DC
converter applications.
DIP-8
SOP-8
General Description
The TS3842B and TS3843B series are high performance fixed frequency current mode controllers.
This is specifically designed for Off-Line and DC-to-DC converter applications offering the designer a
cost effective solution with minimal external components. This integrated circuits feature a trimmed
oscillator for precise duty cycle control, a temperature compensated reference, high gain error
amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving
a power MOSFET.
Also included are protective features consisting of input and reference undervoltage lockouts each
with hysteresis, cycle-by-cycle current limiting, programmable output deadtime, and a latch for
single pulse metering.
This device is available in 8-pin dual-in-line plastic packages as well as the 8-pin plastic surface
mount (SOP-8). The SOP-8 package has separate power and ground pins for the totem pole output
stage.
The TS3842B has UVLO thresholds of 16V (on) and 10V (off), ideally suited for off-line converters.
Features
Trimmed Oscillator Discharge Current for
Precise Duty Cycle Control
Current Mode Operation to 500KHz
Automatic Feed Forward Compensation
Latching PWM for Cycle-By-Cycle Current
Limiting
Internally Trimmed Reference with Undervoltage
Lockout
High Current Totem Pole Output
Undervoltage Lockout with Hystersis
Low Start-Up and Operating Current
Block Diagram
V
CC
V
ref
8(14)
R
R
R
T
/C
T
4(7)
Voltage
Feedback
Input
2(3)
Output
Compensation
1(1)
V
ref
Undervoltage
Lockout
5.0V
Reference
7(12)
V
CC
Undervoltage
Lockout
V
C
7(11)
Output
Oscillator
Latching
PWM
+
-
Ordering Information
OPERATING TEMPERATURE
(Ambient)
-20 to +85+
DEVICE
TS3842/3843BCD
TS3842/3843BCS
PACKAGE
DIP-8
SOP-8
6(10)
Power
Ground
5(8)
Current
Sense
3(5)Input
Error
Amplifier
The document contains information on a new product.Specifications and
information herein are subject to change without notice.

TS3842BCS Related Products

TS3842BCS TS3842 TS3842B TS3842BCD TS3843B TS3843BCD TS3843BCS
Description High Performance Current Mode Controller High Performance Current Mode Controller High Performance Current Mode Controller High Performance Current Mode Controller High Performance Current Mode Controller High Performance Current Mode Controller High Performance Current Mode Controller
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