NUS6189MN Datasheet, PDF (3/14 Pages) ON Semiconductor – Low Profile Overvoltage Protection IC with Integrated MOSFET

NUS6189MN
FUNCTIONAL PIN DESCRIPTIONS
Pin
Function
Description
1
Source 1 This pin is the source of MOSFET1 and connects to the more negative Vsense pin of the PMIC and
to the more negative side of the current sense resistor.
2, 16, 17, 21, 22
Batt
These pins are the drain of MOSFET2 and connect to the battery and the Vbat pin of the PMIC.
3
Base
The base of the internal bipolar transistor is connected to this pin. It connects to the Charge Control
pin of the PMIC.
4, 5, 6, 7
Collector The collector of the internal bipolar transistor connects to these pins and should be connected to the
more positive side of the current sense resistor as well as the more positive Vsense pin of the PMIC.
8
9, 11, 13
Emitter
OVP_OUT
This pin is connected to the emitter of the bipolar transistor. It should be connected externally to the
OVP_OUT pins.
These pins are the output of the OVP circuit. Internally they connect to the drain of MOSFET2. These
pins connect externally to the Vcharge pin of the PMIC.
10
Gate2
This pin is the gate of MOSFET2. It is not normally connected to external circuitry.
12
Source 2 The source of the OVP FET is connected to this pin. This pin needs to be connected to pins 14 & 15.
14
V_CC
This pin is the V_CC pin of the OVP chip. It needs to be connected to pins 12 and 15.
15
V_IN
This pin senses the output voltage of the charger. If the voltage on this input rises above the over-
voltage threshold (V_TH), the OVP_OUT pin will be driven to within 1.0 V of V_IN, thus disconnecting the
FET. The nominal threshold level is 6.85 V. This pin needs to be connected to pins 12 and 14.
18
Gate1
This pin is the gate of MOSFET1. It connects to the Bat FET pin of the PMIC.
19
Gnd
This is the ground reference pin for the OVP chip.
20
Control This logic signal is used to control the state of OVP_OUT and turn−on/off the P−channel MOSFET. A
logic level high results in the OVP_OUT signal being driven to within 1.0 V of VCC which turns off
MOSFET2. If this pin is not used, it should be connected to ground.
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