A Voltage-Mode PWM (Pulse-Width Modulation) Controller is an electronic device or integrated circuit (IC) used in power electronics and motor control applications to regulate the output voltage of a power converter, such as a DC-DC converter or a DC-AC inverter. This type of PWM controller operates by comparing a reference voltage with a feedback voltage from the output and adjusting the duty cycle of the PWM signal to maintain the desired output voltage.
Part Number: SDC2921
Function: Voltage Mode PWM Controller
Package: DIP 16 Pin Type
Manufacturer: SDC
Images:
Description
The SDC2921 is a Pulse–Width Modulation (PWM) control circuit with complete protection circuits for the SMPS (Switching Mode Power Supply). It contains various functions, can minimize external components of switching power supply systems in personal computer. […]
Applications:
1. Complete PWM control and protection circuits
2. Over voltage protection for 3.3V/ 5V/ 12V/ PT
3. Under voltage protection for 3.3V/ 5V/ 12V
4. 280ms PG time delay
5. Open drain power good output
6. 280ms time delay for UVP
7. Remote ON/OFF function
8. Built-in soft-start function
Pin Discriptions :
1 V33 OVP/UVP input for 3.3V
2 V5 OVP/UVP input for 5V
3 V12 OVP/UVP input for 12V
4 PT Extra OVP protection input
5 GND Ground
6 RT Oscillation frequency set by external resistor
7 C1 PWM open drain output 1
8 C2 PWM open drain output 2
9 REM Remote on/off input
10 SS Soft start function set by external capacitor
11 PG Power good signal
12 DET Extra protection input
13 VCC Supply voltage
14 OPOUT OP output
15 VIN- OP negative input
16 VIN+ OP positive input
SDC2921 PDF Datasheet
