SABRE-LL-I datasheet(68/141 Pages) STMICROELECTRONICS

68 / 141 page

Power bridges

SABRE-LL-I

68/141

Figure 18.

Internal comparator functional block diagram

The functionality of this circuit is obtained by using the bridge 4 output stage. This circuit is

powered directly from VSupply and it is intended to be used as a battery charger or a

switching regulator.

The control loop block diagram is shown in the following figure:

Figure 19.

Battery charger control loop block diagram

The battery charger control loop implements an asynchronous switching regulator intended

to be used as a constant voltage/constant current programmable source.

GPIOz

GPIOx

DECODE

LOGIC

GPIOy

DECODE

LOGIC

GPIOz Logic

Driver

V3v3

GPIOz

DECODE

LOGIC

GPIOz Value From SP

GPIOzMod

GPIOyMode

IREF_FB

VREF_FB

SABRE

COMP_I

COMP_V

PULSE SKIPPING

BURST

CONTROL LOGIC

PEAK CURRENT

MODE CONTROL

LOGIC

BRIDGE 4

PARALLELED

POWER

STAGE

SelFBRef<1:0>

DC4_plus

DC4_minus

SelCurrRef<1:0>

DIFF

AMPLI

LOAD

FBRef

CurrRef

Ilimit

PWM

SABRE-LL-I Datasheet(PDF) 68 Page - STMicroelectronics

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