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參數(shù)資料
| 型號： | ISL9212A |
| 廠商： | Intersil Corporation |
| 英文描述： | Charging System Safety Circuit |
| 中文描述： | 計費系統(tǒng)安全電路 |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 490K |
| 代理商： | ISL9212A |
7
FN6384.0
November 14, 2006
Theory of Operation
The ISL9212A is an integrated circuit (IC) optimized to
provide a redundant safety protection to a Li-ion battery from
charging system failures as well as other operating
anomalies. 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. In addition, the ISL9212A protects
up to 30V input voltage.
Power-Up
The ISL9212A 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 R1 and R2. The
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:
3.0V/1.5A, 3.0V/0.5A, 4.6V/1.5A, 4.6V/0.5A,
5.0V/1.5A, 5.0V/0.5A, 8.1V/1.5A, AND 8.1V/0.5A
ISL9212A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ISL9212AIRZ | Charging System Safety Circuit |
| ISL9212B | Charging System Safety Circuit |
| ISL9212BIRZ | Charging System Safety Circuit |
| ISL9212EVAL1 | Charging System Safety Circuit |
| ISL9212 | Charging System Safety Circuit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISL9212AIRZ | 功能描述:IC CHARGING SYSTEM SAFETY 12-DFN 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) |
| ISL9212AIRZ-T | 功能描述:IC CHARGING SYSTEM SAFETY 12-DFN 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) |
| ISL9212B | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Charging System Safety Circuit |
| 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) |
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