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參數(shù)資料
| 型號(hào)： | ISL9212B |
| 廠商： | Intersil Corporation |
| 英文描述： | Charging System Safety Circuit |
| 中文描述： | 計(jì)費(fèi)系統(tǒng)安全電路 |
| 文件頁(yè)數(shù)： | 7/11頁(yè) |
| 文件大?。?/td> | 532K |
| 代理商： | ISL9212B |
7
FN6399.0
March 21, 2007
Theory of Operation
The ISL9212B is an integrated circuit (IC) optimized to
provide a redundant safety protection to a Li-ion battery from
charging system failures. The IC monitors the input voltage,
the battery voltage and the charge current. When any of the
above three parameters exceeds its limit, the IC turns off an
internal P-Channel MOSFET to remove the power from the
charging system. In addition to the above protected
parameters, the IC also monitors its own internal
temperature and turns off the P-Channel MOSFET when the
temperature exceeds +140°C. Together with the battery
charger IC and the protection module in a battery pack, the
charging system has triple-level protection from over-
charging the Li-ion battery and is two-fault tolerant. The
ISL9212B protects up to 30V input voltage.
Power-Up
The ISL9212B has a power-on reset (POR) threshold of
2.6V with a built-in hysteresis of 100mV. Before the input
voltage reaches the POR threshold, the internal power PFET
is off. Approximately 10ms after the input voltage exceeds
the POR threshold, the IC resets itself and begins the soft-
start. The 10ms delay allows any transients at the input
during a hot insertion of the power supply to settle down
before the IC starts to operate. The soft-start slowly turns on
the power PFET to reduce the inrush current as well as the
input voltage drop during the transition. The power-up
behavior is illustrated in Figure 2.
Input Overvoltage Protection (OVP)
The input voltage is monitored by the comparator CP1 in the
Block Diagram (Figure 1). CP1 has an accurate reference of
1.2V from the bandgap reference. The OVP threshold is set
by the resistive divider consisting of R
1
and R
2
. The
protection threshold is set to 6.8V. When the input voltage
FIGURE 20. EN INPUT THRESHOLD vs TEMPERATURE
FIGURE 21. EN PIN INTERNAL PULL-DOWN RESISTANCE
FIGURE 22. ON-RESISTANCE vs TEMPERATURE AT DIFFERENT INPUT VOLTAGES AND LOAD CURRENTS
Typical Operating Performance
The test conditions for the Typical Operating Performance are: V
IN
= 5V, T
A
= +25°C,
R
ILIM
= 25.5k
Ω
, R
VB
= 200k
Ω
, Unless Otherwise Noted.
(Continued)
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-50
-20
10
40
70
100
130
E
TEMPERATURE (°C)
150
160
170
180
190
200
210
220
230
240
250
-50
-20
10
TEMPERATURE (°C)
40
70
100
130
E
Ω
)
0
0.05
0.10
0.15
0.20
0.25
0.30
0.35
-50
-20
10
TEMPERATURE (°C)
40
70
100
130
r
D
Ω
)
FROM TOP TO BOTTOM V
IN
AND I
LOAD
ARE:
3V/1.5A, 3V/0.5A, 4.6V/1.5A, 4.6V/0.5A,
5V/1.5A, 5V/0.5A, 6.5V/1.5A, AND 6.5V/0.5A
ISL9212B
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL9212BIRZ | Charging System Safety Circuit |
| ISL9212EVAL1 | Charging System Safety Circuit |
| ISL9212 | Charging System Safety Circuit |
| ISL9212IRZ | Charging System Safety Circuit |
| ISL9216 | 8 to 12 Cell Li-Ion Battery Overcurrent Protection and Analog Front End Chip Set |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL9212BIRZ | 功能描述:IC SAFETY SYSTEM CHARGER 12-TDFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| ISL9212BIRZ-T | 功能描述:IC SAFETY SYSTEM CHARGER 12-TDFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
| ISL9212EVAL1 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Charging System Safety Circuit |
| ISL9212EVAL1Z | 制造商:Intersil Corporation 功能描述:ISL9212 EVAL BOARD 1 - ROHS COMPLIANT - TDFN - Bulk |
| ISL9212IRZ | 功能描述:IC SAFETY SYSTEM CHARGER 12-TDFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電池管理 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 功能:電池監(jiān)控器 電池化學(xué):堿性，鋰離子，鎳鎘，鎳金屬氫化物 電源電壓:1 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-6 包裝:帶卷 (TR) |
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