RT9986A datasheet(5/24 Pages) RICHTEK

Nome de Peças	RT9986A

Descrição Electrónicos	7-CH DC/DC Converter for DSC

PDF	24 Pages

Scroll/Zoom	100%

Fabricante Electrônico	RICHTEK [Richtek Technology Corporation]

Página de início	http://www.richtek.com

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5 / 24 page

DS9986A-00 May 2011

www.richtek.com

RT9986A

Timing Diagram

Timing Diagram for CH1 to CH4

CH5 and CH6 Power Sequence

The power on sequence is :

When EN56 goes high, CH5 will turn on first. After 10ms, CH6 will turn on.

The power off sequence is :

When EN56 goes low, CH6 will turn off first and VOUT6 will be internally pulled to GND.

When VOUT6 >

−0.12V, CH6 discharging completes and then CH5 turns off. Finally, the whole IC shuts down.

Power On Sequence : CH5 HV Step-Up 15V → CH6 INV

−7V

Power Off Sequence : CH6 INV

−7V → CH5 HV Step-Up 15V

EN1234

CH1 VOUT

CH3 VOUT

CH4 VOUT

CH2 VOUT

User define

VDDM = Max

(BAT, PVDD1)

3.5ms

Wait until FB4 < 0.1V

Wait until FB3 < 0.1V

3.5ms

Wait until FB2 < 0.1V

EN56

CH5

VOUT

10ms

CH6

VOUT

Discharge by internal N-MOSFET

Wait until VOUT6 close to 0V

Constant Current

Pre-Charge.

10ms

RT9986A Folha de dados(PDF) 5 Page - Richtek Technology Corporation