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| 型号： | A6268KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 7/19页 |
| 文件大小： | 0K |
| 描述： | IC LED CTLR AUTOMOBILE 16TSSOP |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 低端，PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 车载，背光 |
| 频率： | 100kHz ~ 700kHz |
| 电源电压： | 5 V ~ 50 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 150°C |
| 其它名称： | 620-1473-6 |
A6268
Automotive High Current LED Controller
ELECTRICAL CHARACTERISTICS 1 (continued) Valid at T J = –40°C to 150°C, V IN = 5 to 40 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Diagnostics and Protection (continued )
LED String Short Voltage
Non-Reference LED Short Offset
Voltage
Reference LED Short Offset Voltage
LED Open Voltage
V SCL
V SCO
V SCOR
V OCL
350
150
350
5
475
225
475
5.5
600
300
600
6
mV
mV
mV
V
LF Bias Current (BB mode) 3
LA Bias Current (BB mode) 3
LF Bias Current (B mode) 3
I LF
I LA
I LF
LF = LA = VIN + 1.7 V
LF = LA = VIN + 1.7 V
LF = 1.7 V
–
–
–
50
90
8
–
–
–
μ A
μ A
μ A
LA Bias Current (B
mode) 3
I LA
LA = 1.7 V
–
24
–
μ A
LED Undercurrent Voltage Difference 6
LED Overcurrent Voltage Difference 7
V UCL
V OVCL
–
–
1
1
–
–
mV
mV
LED Sense Resistor Negative
Overcurrent Threshold 8
Open Fault Time-Out
Overtemperature Warning Threshold
Overtemperature Hysteresis
V NOCL
t OTO
T JF
T Jhys
V NOCL = V LP – V LN
f OSC = 350 kHz
Temperature increasing
Recovery = T JF – T Jhys
–
–
–
–
–200
94
170
15
–
–
–
–
mV
ms
oC
oC
1 For
input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
2 Function is correct but parameters are not guaranteed below the general limit (5 V).
3 Parameters ensured by design.
4 BB mode = buck-boost (supply-referenced) mode, B mode = boost (ground-referenced) mode.
5 Fault Blank timer not enabled for open-LED condition.
6 Undercurrent when V SENSEL < V IDL – V UCL , where V SENSEL is the voltage across the LED current sense resistor R SL .
7 Overcurrent when V SENSEL > V IDL +V OVCL , where V SENSEL is the voltage across the LED current sense resistor R SL .
8 Protection only provided in buck-boost mode with LED cathode (LP) connection shorted to ground.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
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