NCP391 Datasheet, PDF (3/12 Pages) ON Semiconductor – Positive Overvoltage Protection Controller with Internal Low RON NMOS FET

NCP391
PIN FUNCTION DESCRIPTION
Pin No. Symbol Function
Description
1, 2 or
IN
A1, A2
INPUT
Input Voltage Pins. These pins are connected to the Wall Adapoter (AC−DC, Vbus ..). A 1 mF low
ESR ceramic capacitor, or larger, must be connected between these pins and GND, as close as
possible to the DUT. The two IN pins must be connected together to power supply. (See PCB recom-
mendation for the pin7).
3 or A3 OUT
OUTPUT Output Voltage Pins. This pin follows IN pins when “no fault” is detected.
4 or B3 FLAG
OUTPUT
Fault Indication Pin. This pin allows an external system to detect a fault on the IN pins. The FLAG pin
goes low when input voltage exceeds OVLO threshold or drops below UVLO threshold or when TSD
is exceeded. Since the FLAG pin is open drain functionality, an external pull−up resistor to V_CC must
be added. (Minimum 10 kW).
5 or B2 GND
POWER Ground
6 or B1
EN
INPUT
Enable Pin. The device enters in shutdown mode when this pin is tied to a high level. In this case the
output is disconnected from the input. To allow normal functionality, the EN pin shall be connected to
GND to a pull down or to a I/O pin. This pin does not have an impact on the fault detection.
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Minimum Voltage (IN to GND)
Minimum Voltage (All others to GND)
Vmin_in
−0.3
V
Vmin
−0.3
V
Maximum Voltage (IN to GND)
Maximum Voltage (All others to GND)
Vmax_in
30
V
Vmax
7.0
V
Maximum Current (UVLO<V_IN<OVLO)
Maximum Peak Current (t ≤ 1 ms, T_A = 85°C)
Thermal Resistance, Junction−to−Air (Note 1)
Operating Ambient Temperature Range
Storage Temperature Range
Junction Operating Temperature
ESD Withstand Voltage (IEC 61000−4−2) (input only) when bypassed with 1.0 mF capacitor
Human Body Model (HBM), Model = 2 (Note 2)
Machine Model (MM) Model = B (Note 3)
Imax
Imax_peak
R_qJA
T_A
T_stg
T_J
Vesd
2.0
4.0
130
−40 to +85
−65 to +150
150
15 Air, 8.0 Contact
2000
200
A
A
°C/W
°C
°C
°C
kV
V
V
Moisture Sensitivity
MSL
Level 1
−
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. The R_qJA is highly dependent on the PCB heat sink area (connected to pin 7).
2. Human Body Model, 100 pF discharged through a 1.5 kW resistor following specification JESD22/A114.
3. Machine Model, 200 pF discharged through all pins following specification JESD22/A115.
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