Features
• Inter nal Regulat or Provides a Stable 5V Re ference Sup ply
Trimmed to 5%
• Uncommi tted Output TR fo r 200mA Sink or Source
Current
• Output Control For Push-Pull or Single Ended Operation
• Variable Duty Cycle By Dead Time Control (Pin 4)
Complete PWM Control Circuit
• On-Chip Oscillator With Master or Slave Operation
• Internal Circuit Prohibits Double Pulse at Either Output
Description
The is used for the control circuit of the PWM
switching regulator. The consists of 5V reference
voltage circuit, two error amplifiers, a flip flop, an output
control circuit, a PWM comparator, a dead time comparator
and an oscillator. This device can be operated in the
switching frequency of 1kHz to 300kHz.
16-DIP
16-SOP
Internal Block Diagram
SMPS Controller
SL494CN
1
www.slkormicro.com
SL494CN
The is used for the control circuit of the PWM
SL494CN
switching regulator. The consists of 5V reference
voltage circuit, two error amplifiers, a flip flop, an output
control circuit, a PWM comparator, a dead time comparator
and an oscillator. This device can be operated in the
switching frequency of 1kHz to 300kHz.
SL494CN SL494CNS
Absolute Maximum Ratings
Parameter Symbol Value Unit
Supply Voltage V
CC
41 V
Collector Supply Voltage V
C
41 V
Output Current I
O
250 mA
Amplifier Input Voltage V
IN
V
CC
+0.3 V
Power Dissipation (T
A
= 25°C) P
D
1 (SL494CN)
0.9 (SL494CNS)
W
Operating Temperature Range T
OPR
0 ~ +70 °C
Storage Temperature Range T
STG
-65 ~ +150 °C
SL494CN
2
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