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參數(shù)資料
| 型號： | ISL88731 |
| 廠商： | Intersil Corporation |
| 英文描述： | SMBus Level 2 Battery Charger |
| 中文描述： | 2級的SMBus電池充電器 |
| 文件頁數(shù)： | 11/22頁 |
| 文件大小： | 474K |
| 代理商： | ISL88731 |
11
FN9258.0
November 20, 2006
Byte Format
Every byte put on the SDA line must be eight bits long and
must be followed by an acknowledge bit. Data is transferred
with the most significant bit first (MSB) and the least
significant bit last (LSB).
ISL88731 and SMBus
The ISL88731 receives control inputs from the SMBus
interface. The serial interface complies with the SMBus
protocols as documented in the System Management Bus
Specification V1.1, which can be downloaded from
www.smbus.org. The ISL88731 uses the SMBus Read-Word
and Write-Word protocols (Figure 18) to communicate with
the smart battery. The ISL88731 is an SMBus slave device
and does not initiate communication on the bus. It responds
to the 7-bit address 0b0001001_ (0x12).
Read address = 0b00010011 and
Write address = 0b00010010.
In addition, the ISL88731 has two identification (ID)
registers: a 16-bit device ID register and a 16-bit
manufacturer ID register.
The data (SDA) and clock (SCL) pins have Schmitt-trigger
inputs that can accommodate slow edges. Choose pull-up
resistors for SDA and SCL to achieve rise times according to
the SMBus specifications. The ISL88731 is controlled by the
data written to the registers described in Table 1.
Battery Charger Registers
The ISL88731 supports five battery-charger registers that
use either Write-Word or Read-Word protocols, as
summarized in Table 1. ManufacturerID and DeviceID are
“read only” registers and can be used to identify the
ISL88731. On the ISL88731, ManufacturerID always returns
0x0049 (ASCII code for “I” for Intersil) and DeviceID always
returns 0x0001.
Enabling and Disabling Charging
After applying power to ISL88731, the internal registers
contain their POR values (see Table 1). The POR values for
charge current and charge voltage are 0x0000. These
values disable charging. To enable charging, the
ChargeCurrent register must be written with a number
>0x007F and the ChargeVoltage register must be written
with a number >0x000F. Charging can be disabled by writing
0x0000 to either of these registers.
FIGURE 18. SMBus/ISL88731 READ AND WRITE PROTOCOL
A
S
A
N
P
SLAVE
ADDR + W
REGISTER
ADDR
HI BYTE
DATA
LO BYTE
DATA
A
A
A
S
A
P
SLAVE
ADDR + W
REGISTER
ADDR
HI BYTE
DATA
LO BYTE
DATA
A
A
N
S
A
SLAVE
ADDR + R
P
Acknowledge
No Acknowledge
S
Start
P
Stop
Driven by the master
Driven by ISL88731
Write to a Register
Read from a Register
TABLE 1. BATTERY CHARGER REGISTOR SUMMARY
REGISTER
ADDRESS
REGISTER NAME
READ/WRITE
DESCRIPTION
POR STATE
0x14
ChargeCurrent
Read or Write
6-Bit Charge Current Setting
0x0000
0x15
ChargeVoltage
Read or Write
11-Bit Charge Voltage Setting
0x0000
0x3F
InputCurrent
Read or Write
6-Bit Charge Current Setting
0x0080
0xFE
ManufacturerID
Read Only
Manufacturer ID
0x0049
0xFF
DeviceID
Read Only
Device ID
0x0001
ISL88731
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
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| ISL88731AHRZ | 制造商:Intersil Corporation 功能描述:IC BATTERY CHARGER LI-ION 8A TQFN-28 |
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| ISL88731CHRTZ | 制造商:Intersil Corporation 功能描述:PB-FREE ISL88731C NOTEBOOK BATTERY CHARGER (P6 SHRINK) - Rail/Tube 制造商:Intersil 功能描述:ISL88731C NOTEBOOK BATRY CHRGRP6 SHRINK |
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