135VSS View Datasheet(PDF) - Summit Microelectronics

Part Name

Description

Manufacturer

135VSS

Programmable Switch-mode, USB/AC Input Li+ Battery Charger with TurboCharge™ Mode*

Summit Microelectronics 

SMB135

CONFIGURATION REGISTERS

The following tables (Tables 3 to 15) describe the user-programmable registers of the SMB135 programmable battery

charger. Locations 00-0F are non-volatile, EEPROM registers; however, registers 00-07, which contain the battery

charging parameters, may also be configured to be programmable in RAM. Locations 31-3F contain volatile status and

command registers. To lock all of the configuration registers, set 0E[2]=1; please note that this operation cannot be

undone. To allow volatile access to locations 00-07, set 0E[0]=1; then after every power-on, 31[7] must also be set

high. It is prohibited to write to any location, not specifically mentioned in the tables below7. Default register

settings are in BOLD.

Table 3 – Charge current – 8-bit (address: 00h) – Non-Volatile & Volatile (mirror)

Fast Charge Current

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

RSENSE=100mΩ

RSENSE=50mΩ

0

0

0

0

X

X

X

X

47.5mA

95mA

0

0

0

1

X

X

X

X

62.5mA

125mA

0

0

1

0

X

X

X

X

65.0mA

130mA

0

0

1

1

X

X

X

X

67.5mA

135mA

0

1

0

0

X

X

X

X

195mA

390mA

0

1

0

1

X

X

X

X

225mA

450mA

0

1

1

0

X

X

X

X

255mA

510mA

0

1

1

1

X

X

X

X

285mA

570mA

1

0

0

0

X

X

X

X

315mA

630mA

1

0

0

1

X

X

X

X

345mA

690mA

1

0

1

0

X

X

X

X

375mA

750mA

1

0

1

1

X

X

X

X

405mA

810mA

1

1

0

0

X

X

X

X

435mA

870mA

1

1

0

1

X

X

X

X

465mA

930mA

1

1

1

0

X

X

X

X

495mA

990mA

1

1

1

1

X

X

X

X

525mA

1050mA

Pre-charge current

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

RSENSE=100mΩ

RSENSE=50mΩ

X

X

X

X

0

0

0

0

25mA

50mA

X

X

X

X

0

0

0

1

37.5mA

75mA

X

X

X

X

0

0

1

0

50mA

100mA

X

X

X

X

0

0

1

1

62.5mA

125mA

X

X

X

X

0

1

0

0

75mA

150mA

X

X

X

X

0

1

0

1

87.5mA

175mA

X

X

X

X

0

1

1

0

100mA

200mA

X

X

X

X

0

1

1

1

112.5mA

225mA

X

X

X

X

1

0

0

0

125mA

250mA

X

X

X

X

1

0

0

1

137.5mA

275mA

X

X

X

X

1

0

1

0

150mA

300mA

X

X

X

X

1

0

1

1

162.5mA

325mA

X

X

X

X

1

1

0

0

175mA

350mA

X

X

X

X

1

1

0

1

187.5mA

375mA

X

X

X

X

1

1

1

0

200mA

400mA

X

X

X

X

1

1

1

1

212.5mA

Note 7: Never Write to Reserved bits. Note 8: Charge current can be limited by internal current limit under certain conditions.

425mA

Summit Microelectronics, Inc

2106 3.1 11/4/2008

24

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