M51995AFP

Product Summary

The M51995AFP is a primary switching regulator controller which is especially designed to get the regulated DC voltage from AC power supply. This IC can directly drive the MOS-FET with fast rise and fast fall output pulse. The M51995AFP has the functions of not only high frequency OSC and fast output drive but also current limit with fast response and high sensibility so the true fast switching regulator can be realized. The M51995AFP has another big feature of current protection to short and over current, owing to the integrated timer-type protection circuit, if few parts are added to the primary side. The M51995AFP is equivalent to the M51977 with externally re-settable OVP (over voltage protection) circuit.

Parametrics

M51995AFP absolute maximum ratings: (1)Supply voltage, VCC: 36 V; (2)Collector voltage, VC: 36 V; (3)±2 Output current, IO: ±0.15 A; (4)VF terminal voltage, VVF: VCC; (5)ON/OFF terminal voltage, VON/OFF: VCC; (6)CLM?terminal voltage, VCLM-: -4.0 to +4.0 V; (7)CLM+terminal voltage, VCLM+: -0.3 to +4.0 V; (8)OVP terminal current, IOVP: 8 mA; (9)DET terminal voltage, VDET: 6 V; (10)DET terminal input current, IDET: 5 mA; (11)F/B terminal voltage, VFB: 0 to 10 V; (12)T-ON terminal input current, ITON: -1 mA; (13)T-OFF terminal input current, ITOFF: -2 mA; (14)Power dissipation, Pd: 1.5 W; (15)Operating temperature, Topr: -30 to +85℃; (16)Storage temperature, Tstg: -40 to +125℃; (17)Junction temperature, Tj: 150℃.

Features

M51995AFP features: (1)500 kHz operation to MOS FET: Output current: ±2 A; Output rise time 60 ns, fall time 40 ns; Modified totempole output method with small through current; (2)Compact and light-weight power supply; (3)Simplified peripheral circuit with protection circuit and build-in large-capacity totempole output; (4)High-speed current limiting circuit using pulse-by-pulse method; (5)Protection by intermittent operation of output over current: Timer protection circuit; (6)Over-voltage protection circuit with an externally re-settable latch (OVP); (7)Protection circuit for output miss action at low supply voltage(UVLO); (8)High-performance and highly functional power supply; (9)Triangular wave oscillator for easy dead time setting.

Diagrams