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参数资料
| 型号： | DS2778G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 29/46页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE LI+ 2CELL 14-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4 V ~ 9.2 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x5） |
| 包装： | 带卷 (TR) |
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2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
Overcurrent Thresholds
The overcurrent thresholds are set in the upper nibble of the RSGAIN register. The OC1 and OC0 bits set the over-
current thresholds for the charge and discharge thresholds. The short-circuit threshold is set by the SC0 bit (see
Tables 6 and 7, respectively, for overcurrent and short-circuit threshold values). The DS2775–DS2778 have a built-in
fixed delay of t OCD for overcurrent events and t SCD for short-circuit events. This means that the current ADC must
read a value greater than the overcurrent threshold for longer than t OCD and greater than the short-circuit threshold
for longer than t SCD before turning off the FET. Overcurrent and short-circuit events less than their respective delays
are ignored.
ADDRESS 78h
X
SC0
OC1
OC0
X
2 0
2 -1
2 -2
MSb
“X ”: RESERVED
Figure 20. Overcurrent and Short-Circuit Threshold Bits Format
Table 6. COC, DOC Programmability
LSb
Table 7. SC Programmability
OC[1:0] BIT FIELD
00
01
10
11
V COC (mV)
-25
-38
-50
-75
V DOC (mV)
38
50
75
100
SC0 BIT FIELD
0
1
V SC (mV)
150
300
Special Feature Register Format
All register bits are read and write accessible with default values specified in each bit definition.
Special Feature Register (15h)
BIT 7
X
BIT 6
X
BIT 5
X
BIT 4
X
BIT 3
X
BIT 2
X
BIT 1
SHA_IDLE
BIT 0
PIOB
Bits 7 to 2: Reserved.
Bit 1: SHA Idle Bit (SHA_IDLE). For the DS2777/DS2778, this bit reads logic 1 while an SHA calculation is in
progress and reads logic 0 when the calculation is complete.
Bit 0: PIO Pin Sense and Control Bit (PIOB). Writing a 0 to the PIOB bit activates the PIO pin open-drain output
driver, forcing the PIO pin low. Writing a 1 to PIOB disables the output driver, allowing the PIO pin to be pulled high
or used as an input. Reading PIOB returns the logic level forced on the PIO pin. Note that if the PIO pin is left uncon-
nected with PIOB set, a weak pulldown current source pulls the PIO pin to V SS . PIOB is set to a 1 on power-up.
PIOB is also set in sleep mode to ensure the PIO pin is high-impedance in sleep mode. Note: Do not write PIOB to 0
if PSPIO is enabled.
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相关代理商/技术参数 |
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|---|---|
| DS2778K | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| DS2780 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel Gauge IC |
| DS2780_09 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Standalone Fuel Gauge IC |
| DS2780E | 制造商:Maxim Integrated Products 功能描述:STANDALONG FUELD GAUGE TSSOP - Rail/Tube |
| DS2780E/R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel Gauge IC |
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