计算机：笔记本电脑



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		推荐元件
		应用笔记
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Maxim > 方案 > 计算机：笔记本电脑

用于电池组检测的高压监测

数据资料

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标题/型号

关键优势

QV PDF

1µA、4焊球UCSP/SOT23封装、高精度电流检测放大器
MAX9634

业内尺寸最小的电流检测放大器：1mm x 1mm，I_CC < 1µA，V_OS < 250µV

QV PDF

独立式、2节Li+电池电量计IC，提供保护电路和SHA-1认证选项
DS2775, DS2776, DS2777, DS2778

业内尺寸最小的独立式、2节电池电量计，集成Li+电池保护电路和SHA-1鉴定

QV PDF

基于OCV的独立式电量计
DS2786B

2线独立式电量计，无需学习过程即可提供初始容量估算或保持使用过程中的精度；可理想用于智能电话的push-mail功能

QV PDF

1µA、4焊球UCSP/SOT23封装、高精度电流检测放大器
MAX9938

尺寸最小的电流检测放大器：1mm x 1mm，I_CC < 1µA、V_OS < 500µV、增益误差< 0.5%

高级智能电池组控制器
MAX1788

尺寸最小、功耗最低的电池包控制器，集成了用户可编程微控制器核、库伦计数电量计量、多通道数据采集单元以及兼容于SMBus v1.1的主/从SMBus接口

QV PDF

高压、低电流电压监测器，SOT封装
MAX6457, MAX6458, MAX6459, MAX6460

Key Specifications: Battery Protectors, Selectors and Monitors

Part Number

Functions

Battery Type

Interface

User Data Storage
(Bytes)

Parameters Measured

Battery Protection

V_SUPPLY
(V)

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

min

max

max w/pins

DS2775

Fuel Gauge

Protector

Status Monitor

2 Cell Li-Ion

1-Wire

16 EEPROM

Current

Temperature

Time

Voltage

Over Voltage

Over-Current

Over/Under Voltage

9.2

TDFN/14

-20 to +70

DS2776

Fuel Gauge

Protector

Status Monitor

2 Cell Li-Ion

1-Wire

16 EEPROM

Current

Temperature

Time

Voltage

Over Voltage

Over-Current

Over/Under Voltage

9.2

TDFN/14

-20 to +70

DS2777

Fuel Gauge

Protector

Status Monitor

2 Cell Li-Ion

2-Wire

16 EEPROM

Current

Temperature

Time

Voltage

Over Voltage

Over-Current

Over/Under Voltage

9.2

TDFN/14

-20 to +70

DS2778

Fuel Gauge

Protector

Status Monitor

2 Cell Li-Ion

2-Wire

16 EEPROM

Current

Temperature

Time

Voltage

Over Voltage

Over-Current

Over/Under Voltage

9.2

TDFN/14

-20 to +70

DS2786B

Fuel Gauge

1 Cell Li-Ion

2-Wire

32 EEPROM

Current

Temperature

Voltage

2.5

4.5

TDFN-EP/10

9.6

-40 to +85

See All Battery Protectors, Selectors and Monitors (25)

Key Specifications: Current Sense Amplifiers

Part Number

CMVR
(V)

I_CC
(µA)

Bi-Dir. Curr. Sense

V_{SENSE_FS}
(mV)

V_OS @25°C
(µV)

Gain

Gain Accuracy @25°C
(%)

BW
(kHz)

Comp-
arators

Oper. Temp.
(°C)

Package/Pins

min

max

typ

recomm.

max

@ -3dB

MAX9634 NEW!

1.6

100

250

25 V/V

50 V/V

100 V/V

200 V/V

0.5

125

-40 to +85

UCSP (R)/4

MAX9938

500

125

µDFN/6

SOT/5

UCSP/4

See All Current Sense Amplifiers (26)

Key Specifications: Supervisors (1 Monitored Voltage)

Part Number

Reset Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Supervisor Features

I_CC
(µA)

Active Low

Active High

min

max

MAX6457

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

>=5.5

Open Drain

85ms to 300ms

<1ms

No Watchdog

High Voltage (>6V)

Latched Output

12.5

MAX6458

Open Drain

85ms to 300ms

<1ms

High Voltage (>6V)

Latched Output

Overvoltage/Window Monitor

MAX6460

Open Drain

<1ms

High Voltage (>6V)

Overvoltage/Window Monitor

See All Supervisors (1 Monitored Voltage) (274)

Key Specifications: Supervisors (2 Monitored Voltages)

Part Number

Interface

Reset Thresh.
(V)

Reset Out

t_RESET

Watchdog Feature

Supervisor Features

I_CC
(µA)

Active Low

min

max

MAX6459

R/C Adjustable

1.2 to 1.8

1.8 to 2.5

2.5 to 3.3

3.3 to 5.5

>=5.5

Open Drain

<1ms

No Watchdog

Adjustable Reset Input

High Voltage (>6V)

Overvoltage/Window Monitor

12.5

See All Supervisors (2 Monitored Voltages) (84)