WS9623AB3DF

Datasheet (V1.2)

Copyright © Vimicro_wx, Inc. 1999-2014

10

DEVICE TERMINAL DESCRIPTIONS

Power Supply

WS9623AB3DF is powered by one small Li-Ion battery via the pins VBAT and GNDS1. The voltage value range of

battery is from 3.0V to 5.5V.

It can be connected to charger via the pin VCHG; the charger block will provide smart battery charging

management and power supply through LDO for chip simultaneously. The Input voltage value range of charger is

from 3.0V to 6.5V (From Adapter or USB).

The maximum charging current is 300mA.

WS9623AB3DF

VOL2 (3.3V)

VOL1 (1.2V)

COL2

1

µF

COL1

1

µF

VCHG

VBAT

BAT

CBAT

4.7

µF

RSET

2.5k

Ω

VOL5

VDC(Adj)

COS

4.7

µF

LS

22

µH

PWR

SWS

GNDS

FBS

PWR

VOL2

VOL1

VCHG

VBAT

VOL5

RS

COL5

1

µF

Figure 3 WS9623AB3DF Typical Power Application

Crystal Oscillator

Port XTAL_IN and XTAL_OUT need to be bonded out and connect to the on-board crystal circuit. The load cap for

both pins is 4-12pF. The on-board crystal circuit needs to be placed close to the chip. The on-chip DCXO circuit

can work with crystal frequency 26MHz.

The initialization time for the DCXO circuit to settle to 10ppm accuracy is 2mS. The reference clock generated by

the DCXO goes to RFPLL and DPLL. However, the reference clock generated by DCXO can be directly feed to the

digital baseband in that case.

The on-chip DCXO circuit has a cap tuning array that can be used to trim reference clock frequency.

XTAL_IN

XTAL_OUT

CL=4-12pF

Figure 4 Typical Applications of XTAL_IN and XTAL_OUT