NCP1395A/B
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7
ELECTRICAL CHARACTERISTICS (continued) (For typical values T
j
= 25°C, for min/max values T
j
= −40°C to +125°C,
Max T
J
= 150°C, V
CC
= 11 V, unless otherwise noted.)
Characteristic
Pin Symbol Min Typ Max Unit
TIMERS
Timer Charge Current
6 Itimer − 150 − mA
Timer Duration with a 1.0 mF Capacitor and a 1.0 MW Resistor 6 T−timer − 25 − ms
Timer Recurrence in Permanent Fault, Same Values as Above 6 T−timerR − 1.4 − s
Voltage at which Pin 6 Stops Output Pulses 6 VtimerON 3.7 4.1 4.5 V
Voltage at which Pin 6 Restarts Output Pulses 6 VtimerOFF 0.9 1.0 1.1 V
Soft−Start Ending Voltage, V
FB
= 1.0 V 4 VSS − 2.0 − V
Soft−Start Charge Current 4 ISS 75
Note 5
95 115 mA
Soft−Start Duration with a 220 nF Capacitor (Note 4) 4 T−SS − 5.0 − ms
PROTECTION
Reference Voltage for Fast Input 13 VrefFaultF 1.0 1.05 1.1 V
Reference Voltage for Slow Input 14 VrefFaultS 0.98 1.03 1.08 V
Hysteresis for Fast Input 13 HysteFaultF − 50 − mV
Hysteresis for Slow Input 14 HysteFaultS − 40 − mV
Propagation Delay for Fast Fault Input Drive Shutdown 13 TpFault − 70 120 ns
Brown−Out Input Bias Current 7 IBObias − 0.02 − mA
Brown−Out Level 7 VBO 0.98 1.03 1.08 V
Hysteresis Current, Vpin 7 > VBO – A Version 7 IBO_A 23 28 33 mA
Hysteresis Current, Vpin 7 > VBO – B Version 7 IBO_B 70 83 96 mA
Latching Voltage 7 Vlatch 3.7 4.1 4.5 V
Temperature Shutdown − TSD 140 − − °C
Hysteresis − TSDhyste − 40 − °C
4. The A version does not activate soft−start when the fast−fault is released, this is for skip cycle implementation. The B version does activate
the soft−start upon release of the fast−fault input.
5. Minimum current occurs at T
J
= 0°C.
