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A6267KLPTR-T

更新时间： 2022-05-19 05:17:13
品牌 Logo 应用领域
急速微 - ALLEGRO 转换器驱动控制器
页数 文件大小 规格书
17页 349K
描述
The A6267 is a DC-to-DC converter controller, providing a programmable constant current output for driving high power LEDs in series.

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A6267KLPTR-T 数据手册

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A6267  
Automotive High Current LED Controller  
ELECTRICAL CHARACTERISTICS1 (continued) Valid at TJ = –40°C to 150°C, VIN = 8 to 40 V; unless otherwise noted  
Characteristics  
Oscillator (continued)  
Symbol  
Test Conditions  
Min.  
Typ.  
Max.  
Unit  
OSC Watchdog Period  
tOSWD  
VCOH  
VCOL  
Between successive rising edges  
IOH = –1 mA  
7
VREG – 1  
–
–
–
–
–
μs  
V
CKOUT Output High Voltage  
CKOUT Output Low Voltage  
LED Current Sense  
VREG  
0.4  
IOL = 1 mA  
V
Input Bias Current LN (BB mode)3  
Input Bias Current LP (BB mode)3  
Input Bias Current LN (B mode)3  
Input Bias Current LP (B mode)3  
Differential Input Voltage (Active)  
Input Common-Mode Range (BB mode)3  
Input Common-Mode Range (B mode)3  
Current Error  
ILN  
ILP  
LP = LN = VIN  
–
–
6
220  
–2  
–25  
100  
–
–
μA  
μA  
μA  
μA  
mV  
V
LP = LN = VIN  
–
ILN  
LP = LN = 0 V  
–
–
ILP  
LP = LN = 0 V  
–
–
VIDL  
VCMLH  
VCMLL  
EISL  
EN = High, VIDL = VLP – VLN  
VLP = VLN  
–
–
VIN  
0
VIN + 1  
VLP = VLN  
–
1
5
V
[(10 × ILED × RSL) – 1] × 100  
–5  
–
%
Switch Current Sense  
Input Bias Current  
IBIASS  
VIDS  
IINS  
SP = SN = 0 to 2 V  
VIDS = VSP – VSN with D = 50%  
VIDS = 120 mV  
–30  
110  
–
–
–
180  
–
μA  
mV  
μA  
V
Maximum Differential Input Voltage4  
Input Source Current  
145  
120  
–
Input Common-Mode Range  
Diagnostics and Protection  
Fault Blank Timer5  
VCMS  
VSP = VSN  
0
2
tFB  
Start-up  
–
3
–
ms  
V
VREG Undervoltage Turn-Off  
VREG Undervoltage Hysteresis  
LED String Short Voltage  
VREGUV  
VREGUVhys  
VSCL  
Decreasing VREG  
4.1  
130  
430  
4.3  
150  
505  
4.5  
160  
580  
mV  
mV  
Non-Reference LED Short Offset  
Voltage  
VSCO  
160  
200  
240  
mV  
Reference LED Short Offset Voltage  
LED Open Voltage  
VSCOR  
VOCL  
ILF  
430  
5
505  
5.5  
46  
170  
8
580  
6
mV  
V
LF Bias Current (BB mode)3  
LA Bias Current (BB mode)3  
LF Bias Current (B mode)3  
LA Bias Current (B mode)3  
LED Undercurrent Voltage Difference6  
Open Fault Time-Out  
LF = LA = VIN + 1.7 V  
LF = LA = VIN + 1.7 V  
LF = 1.7 V  
–
–
μA  
μA  
μA  
μA  
mV  
ms  
ºC  
ILA  
–
–
ILF  
–
–
ILA  
LA = 1.7 V  
–
34  
1
–
VUCL  
tOTO  
TJF  
–
–
fOSC = 350 kHz  
–
94  
170  
15  
–
Overtemperature Warning Threshold  
Overtemperature Hysteresis  
Temperature increasing  
Recovery = TJF – TJhys  
–
–
TJhys  
–
–
ºC  
1For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.  
2Function is correct but parameters are not guaranteed below the general limit (8 V).  
3BB mode = buck-boost (supply-referenced) mode, B mode = boost (ground-referenced) mode.  
4Parameters guaranteed by design.  
5Fault Blank timer not enabled for open-LED condition.  
6Undercurrent when VSENSEL < VIDL– VUCL, where VSENSEL is the voltage across the LED current sense resistor RSL  
.
Allegro MicroSystems, Inc.  
115 Northeast Cutoff  
6
Worcester, Massachusetts 01615-0036 U.S.A.  
1.508.853.5000; www.allegromicro.com  
1...3456789...17

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