MP2632B datasheet(4/43 Pages) MPS

4 / 43 page

MP2632B

– ALL-IN-ONE, 3A, SW CHARGER, 3A BOOST

MP2632B Rev. 1.0

www.MonolithicPower.com

3/9/2018

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

PIN FUNCTIONS

P/N

Name

I/O

Description

PGND

Power

Power ground.

Power

Switch output node. Do not place vias on the SW plane during the PCB layout.

3, 4

SYS

Power

System output. Place a minimum 22µF ceramic capacitor as close to SYS and

PGND as possible. The total capacitance should not be lower than 44µF.

VIN

Power

Adapter input. Place a bypass capacitor close to VIN to prevent large input voltage

spikes.

DM1

Negative pin of the input USB data line pair. DM1 together with DP1 implements

USB host/charging port detection automatically.

DP1

Positive pin of the input USB data line pair. DP1 together with DM1 implements

USB host/charging port detection automatically.

Torch-control output. TC is an open-drain structure. The internal driver MOSFET

is on when PB is pulled low for more than 1.5ms twice within one second.

ILIM

Input current set. Connect ILIM to GND with an external resistor to program the

input current limit in charge mode.

DM2

Negative pin of the output USB data line pair. DM2 together with DP2 provides

the correct voltage signal for attached portable equipment to perform DCP detection

automatically.

DP2

Positive pin of the output USB data line pair. DP2 together with DM2 provides

the correct voltage signal for attached portable equipment to perform DCP detection

automatically.

Push button input. Connect a push button from PB to AGND. PB is pulled up by a

resistor internally. When PB is set from high to low for more than 1.5ms, the boost

is enabled and latched if VIN is not available.

LED1-4 are on for five seconds whenever PB is set from high to low for more than

1.5ms.

If PB is set from high to low for more than 1.5ms twice within one second and the

torch light is off, the torch light drive MOSFET is on and latched. However, if PB is

set from high to low for more than 1.5ms twice within one second and the torch

drive MOSFET is on, the torch light drive MOSFET turns off.

If PB is set from high to low for more than 2.5 seconds, this is defined as a long

push, and boost is shut down manually.

TMR

Oscillator period timer. Connect a timing capacitor between TMR and GND to set

the oscillator period. Short TMR to GND to disable the timer function.

ISET

Programmable charge current. Connect an external resistor to GND to program

the charge current.

OLIM

Programmable output current limit for boost mode. Connect an external resistor

to GND to program the system current in boost mode.

VCC

Internal circuit power supply. Bypass VCC to GND with a ceramic capacitor no

higher than 100nF. VCC cannot carry an external load higher than 5mA.

AGND

I/O

Analog ground.

VNTC

Pull-up voltage source for the NTC function. VNTC is connected to VCC through

an internal MOSFET. VNTC is disconnected from VCC during sleep mode. VNTC

should be the pull-up voltage of the external NTC resistive divider.

NTC

Negative temperature coefficient (NTC) thermistor.

Programmable battery regulation voltage. Leave VB floating for 4.2V. Connect

VB to logic high for 4.45V. Connect VB to GND for 4.35V.

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