Pin Number 1 Name RAMP Function PWM modulator ramp. In voltage mode an external R−C circuit from Vin sets the PWM Ramp slope to implement feedforward. In current mode control, the resistor of the external R−C circuit connects to REF for ramp compensation. Soft−start control. A 20 mA current source charges the external capacitor connected to this pin. Dut.
• Support Voltage Mode Control and Peak Current Mode Control
• Line Feedforward
• Adaptive Overlap time Control for Improved Efficiency
• Integrated 120 V High Voltage Startup Circuit
• Programmable Line Undervoltage Lockout (UVLO) with Adjustable
24 23 22 21 20 19
RAMP 1 SS 2
DLMT 3
18 REFA 17 FLT/SD 16 OUTA
Hysteresis
DT 4
15 PGND
• Cycle by Cycle Peak Current Limiting
RT 5
14 OUTM
• Overcurrent Protection Based on Average Current
• Short Circuit Protection
• Programmable Duty Ratio Clamp
AGND 6
13 VCC 7 8 9 10 11 12
COMP RES NC CS REF OTP
• Programmable Soft−Start
• Programm.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | NCP1560 |
ON |
Full Featured Voltage Mode PWM Controller | |
2 | NCP1562A |
ON Semiconductor |
High Performance Active Clamp/Reset PWM Controller | |
3 | NCP1562B |
ON Semiconductor |
High Performance Active Clamp/Reset PWM Controller | |
4 | NCP1566 |
ON Semiconductor |
Dual-Mode Active Clamp PWM Controller | |
5 | NCP1568 |
ON Semiconductor |
AC-DC Active Clamp Flyback PWM | |
6 | NCP1568D |
ON Semiconductor |
DC-DC Active Clamp Flyback PWM | |
7 | NCP1500 |
ON |
Dual Mode PWM/Linear BUCK Converter | |
8 | NCP1501 |
ON Semiconductor |
Dual Mode PWM/Linear Buck Converter | |
9 | NCP1508 |
ON Semiconductor |
High Efficiency Synchronous Step-Down DC-DC Converter | |
10 | NCP1509 |
ON Semiconductor |
High Efficiency Synchronous Step-Down DC-DC Converter | |
11 | NCP151 |
ON Semiconductor |
LDO Regulator | |
12 | NCP1512 |
ON Semiconductor |
PWM Buck Converter |