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参数资料
| 型号： | ISL97801ARZ-T |
| 厂商： | Intersil |
| 文件页数： | 2/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER AUTOMOTIVE 20-QFN |
| 标准包装： | 6,000 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 频率： | 850kHz ~ 1.15MHz |
| 电源电压： | 2.7 V ~ 16 V |
| 输出电压： | 32V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 供应商设备封装： | 20-QFN（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
ISL97801
Absolute Maximum Ratings (T A = +25°C)
Thermal Information
Maximum pin voltage, all pins except below 6.5V
Thermal Resistance
θ JA (°C/W) / θ JC (°C/W)
V IN, SWS1, SWS2, EN/PWM . . . . . . . . . . . . . . . . . . . . . . . . . . .18V
VBAT, FAULT, FB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24V
|VHI - SWS1, SWS2| . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5V
QFN-20 Package (Notes 1, 2) . . . . . . . 39 2.5
Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . +135°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
SWD1, SWD2, OVP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34V
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +105°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: T J = T C = T A
Operating continuously at a junction temperature of +135°C will shorten the life of the device while the thermal shutdown may trigger at a higher temperature than
+135°C since it is a typical number.
NOTE:
1. θ JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
2. For θ JC , the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
V BAT = V IN = 12V, V DC = 5V, T A = -40°C to +105°C unless otherwise specified.
PARAMETER
VIN
DESCRIPTION
Input Supply Voltage
CONDITIONS
I OUT = 350mA, 8 LEDs, BUCK/BOOSTN =
MIN
5
TYP
MAX
16
UNIT
V
GND
VIN
Input Supply Voltage
I OUT = 350mA, 5 LEDs, BUCK/BOOSTN =
2.7
12
V
GND, TMAX disabled
V BAT
Input Supply Monitor
Normal operating range
2.7
16
V
V BATFAULT
Supply Fault Threshold
If V BAT > V BATFAULT , FAULT pin is
17.6
21
24
V
switched to ground
I S E N
I S D IS
R SWITCH
V DC
R OUTOL
Supply Current in V IN
Supply Current in V IN
Power FET On Resistance
Regulated Auxiliary Supply
Auxiliary Supply Open Loop Output
No switching, EN/PWM = 1
No switching, EN/PWM = 0
I SWITCH = 600mA
V IN < V DC
4.75
2.7
0.6
0.15
5
3.5
2.5
0.25
5.25
40
mA
μA
Ω
V
Ω
Resistance
R OUTCL
Auxiliary Supply Closed Loop Output
V IN > 6V, F < 100Hz
6.5
Ω
Resistance
I OUT
I LIMBOOST
I LIMBUCK
Output Drive Current
Power Switch Current Limit
Power Switch Current Limit
4 LED output string. V IN = V BAT = 10V
BUCK/BOOSTN = GND
BUCK/BOOSTN = VDC
1
3.6
2.4
A
A
A
OVPH
Over Voltage Positive Going Voltage
Upper threshold to enter overvoltage fault
31
32
V
Mode Threshold
mode, T A = +25°C
OVPL
Over Voltage Negative Going Voltage
Lower threshold to exit overvoltage fault
20
23
V
Mode Threshold
mode, T A = +25°C
V GATE
V GATE
V FB
Protection FET VGS (gate clamp)
Protection FET VGS (gate clamp)
Feedback Voltage
V IN - V FAULT
V FAULT - V IN
System in regulation, V LEVEL = 1V,
9.76
8.16
0.19
12.2
10.2
0.2
14.64
12.24
0.21
V
V
V
VIN = 12V, 6 LEDs
2
FN6428.1
April 2, 2007
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