SGM4056_17 datasheet(3/20 Pages) SGMICRO

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SGM4056

High Input Voltage Charger

OCTOBER 2017

SG Micro Corp

www.sg-micro.com

PIN CONFIGURATIONS

(TOP VIEW)

VIN

PPR

CHG

BAT

IREF

IMIN

GND

BAT

IREF

IMIN

GND

VIN

PPR

CHG

SOIC-8 (Exposed Pad)

TDFN-3×3-8L/TDFN-2×3-8L/TDFN-2×2-8L

PIN DESCRIPTION

NAME

FUNCTION

VIN

Power Input. The absolute maximum input voltage is 26.5V. A 1μF or larger value X5R ceramic

capacitor is recommended to be placed very close to the input pin for decoupling purpose. Additional

capacitance may be required to provide a stable input voltage.

PPR

Open-drain Power Presence Indication. The open-drain MOSFET turns on when the input voltage is

above the POR threshold but below the OVP threshold and off otherwise. This pin is capable to sink

15mA (MIN) current to drive an LED. The maximum voltage rating for this pin is 5.5V. This pin is

independent on the EN pin input.

CHG

Open-drain Charge Indication. This pin outputs a logic low when a charge cycle starts and turns to high

impedance when the end-of-charge (EOC) condition is qualified. This pin is capable to sink 15mA (MIN)

current to drive an LED. When the charger is disabled, the CHG pin outputs high impedance.

Enable Input. This is a logic input pin to disable or enable the charger. Drive to high to disable the

charger. When this pin is driven to low or left floating, the charger is enabled. This pin has an internal

200kΩ pull-down resistor.

GND

System Ground.

IMIN

End-of-Charge (EOC) Current Programming Pin. Connect a resistor between this pin and the GND pin

to set the EOC current. The EOC current IMIN can be programmed by the following equation:

MIN

IMIN

10070

0.5

−

(mA)

where RIMIN is in kΩ. The programmable range covers 5% (or 10mA, whichever is higher) to 50% of

IREF. When programmed to less than 5% or 10mA, the stability is not guaranteed.

IREF

Charge-Current Programming and Monitoring Pin. Connect a resistor between this pin and the GND pin

to set the charge current limit determined by the following equation:

REF

IREF

12080

−

(mA)

where RIREF is in kΩ. The resistor should be located very close to this pin. The IREF pin voltage also

monitors the actual charge current during the entire charge cycle, including the trickle, constant-current,

and constant-voltage phases. When disabled, VIREF = 0V.

BAT

Charger Output Pin. Connect this pin to the battery. A 1μF or larger X5R ceramic capacitor is

recommended for decoupling and stability purposes. When the EN pin is pulled to logic high, the BAT

output is disabled.

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