RT9536H datasheet(13/15 Pages) RICHTEK

13 / 15 page

RT9536H

DS9536H-00

June 2015

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Condition

CHGSB

PGB

Input OVP

OFF

Input UVLO

OFF

Charge (CC Mode and CV Mode)

Charge Done (IFULL)

OFF

PGB Deglitches Time

Condition

EN/SET is

High

EN/SET is

Low

Entering OVP

(VIN = 5.5V10V)

100

s

Leaving OVP

(VIN = 10V5.5V)

500

s

450

s

Entering SLEEP

(VIN = 5.5V3.6V)

32ms

Leaving SLEEP

(VIN = 3.6V5.5V)

500

s

500

s

Entering UVLO

(VIN = 5.5V2.5V)

Leaving UVLO

(VIN = 2.5V5.5V)

230

s

230

s

Table 2

Sleep Mode

The RT9536H enters sleep mode if the power is removed

from the input. This feature prevents draining the battery

during the absence of input supply.

Temperature Regulation and Thermal Protection

In order to maximize charge rate, the RT9536H features

a junction temperature regulation loop. If the power

dissipation of the IC results in a junction temperature

greater than the thermal regulation threshold (125

°C), the

RT9536H limits the charge current in order to maintain a

junction temperature around the thermal regulation

threshold (125

°C). The RT9536H monitors the junction

temperature, TJ, of the die and disconnects the battery

from the input if TJ exceeds 125

°C. This operation

continues until junction temperature falls below thermal

regulation threshold (125

°C) by the hysteresis level. This

feature prevents maximum power dissipation from

exceeding typical design conditions.

EOC

(%) =

; K

= 200

The current threshold of IEOC (%) is defined as the

percentage of fast-charge current set by RISET. After the

CHGSB pin is pulled high, the RT9536H still monitors the

battery voltage. Charge current is resumed when the

battery voltage goes to lower than the battery regulation

voltage threshold.

Factory Mode

The RT9536H provides factory mode for supplies up to

2.3A for powering external loads with no battery installed

and BATT is regulated to 4.25V. The factory mode allows

the user to supply system power with no battery

connected. In factory mode, thermal regulation is disabled

but thermal protection (155

°C) is still active. When using

currents greater than 1.5A in factory mode, the user must

limit the duty cycle at the maximum current to 20% with

a maximum period of 10ms.

LDO

The RT9536H integrates one low dropout linear regulator

(LDO) that supplies up to 50mA. The LDO is active

whenever the input voltage is between POR threshold and

OVP threshold. It is not affected by the EN/SET input.

Note that the LDO current is independence and not

monitored by the charge current limit.

Charge Status Outputs (CHGSB and PGB)

The open-drain CHGSB and PGB outputs indicate various

charger operations as shown in the following Table. These

status pins can be used to drive LEDs or communicate to

the host processor. Note that ON indicates the open-drain

transistor is turned on and LED is bright.

The end-of-charge current threshold is set by the IEOC

pin. The resistor REOC is connected to IEOC and GND.

The parameters KEOC and IEOC are specified in the

specification Table.

RT9536H Datasheet(PDF) 13 Page - Richtek Technology Corporation

RT9536H Datasheet(HTML) 13 Page - Richtek Technology Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Datasheet Download

Link URL