Power Integrations Inc. SMP402
The SMP402, intended for non-isolated ISDN telecommunications power supply applications, combines a high voltage power MOSFET switch with a switchmode power system controller in a monolithic integrated circuit. The P-channel power MOSFET switch features include high voltage, low RDS(ON), and low capacitance. The controller section of the SMP402 contains all the blocks required to drive and control the power stage: start-up preregulator circuit, oscillator, bandgap reference, error amplifier, gate driver and level shift.| Part No. | SMP402 |
|---|---|
| Datasheet | SMP402 Download |
| Manufacturer |  Power Integrations Inc. |
| Description | 20-72 VDC Input Non-isolated DC Output |
| Buy | Stock & Price |
DESCRIPTION
Few external components are required to implement a low cost power supply which meets stringent ISDN specifications. High frequency operation reduces total power supply size. Lower capacitance results in a reduction in gate drive power, and also facilitates higher frequency operation. Protection features include undervoltage lockout, thermal shutdown, and input polarity and level sensing. The SMP402 is available in a 16-pin plastic SOIC package. VIN VLS ENABLE D GND A GND SENSE+ SENSE REXT 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 OUT POLARITY LEVEL VS EA IN EA OUT VBIAS CEXT PI-553B-012892 Figure 2. Pin Configuration. ORDERING INFORMATION PART NUMBER SMP402SC PACKAGE OUTLINE S16A Tj RANGE 0 to 120°C January 1996 SMP402 VIN VLS ENABLE VBIAS VS A GND REXT D GND S CEXT EA OUT + OUT HV REG UV LOCKOUT VREF BANDGAP REF THERMAL SHUTDOWN LEVEL SHIFT Q S R Q OSC + - R PWM COMPARATOR EA IN - ERROR AMPLIFIER 4V + VS 23 µA 5 µA VS SENSE+ LEVEL POLARITY VS 23 µA 5 µA VS SENSE- PI-552B-062293 Figure 3.
