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A8519KETTR-R-1

更新时间： 2024-01-24 09:01:05
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35页 4309K
描述
Fully integrated 42 V MOSFET for boost converter

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A8519KETTR-R-1 数据手册

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A8519 and  
A8519-1  
Wide Input Voltage Range, High-Efficiency,  
Fault-Tolerant LED Driver  
ELECTRICAL CHARACTERISTICS [1]: Unless otherwise specified, specifications are valid at VIN = 16 V, TA = 25°C; ● indicates  
specifications guaranteed over the full operating temperature range with TA = TJ = -40°C to 125°C; typical specifications are at TA = 25°C  
Characteristic  
INPUT VOLTAGE  
Symbol  
Test Conditions  
Min.  
Typ.  
Max.  
Unit  
Input Voltage Range [3]  
UVLO Start Threshold  
VIN  
●
●
●
4.5  
–
–
–
40  
4.35  
3.9  
V
V
VUVLOrise  
VUVLOfall  
VUVLOHYS  
VIN rising  
VIN falling  
UVLO Stop Threshold  
–
–
V
UVLO Hysteresis  
300  
450  
600  
mV  
INPUT SUPPLY CURRENT  
Input Quiescent Current  
Input Sleep Supply Current  
INPUT LOGIC LEVELS (PWM, APWM)  
Input Logic Level Low  
IQ  
VPWM = VIH, fSW = 2 MHz  
●
●
–
–
8
15  
10  
mA  
µA  
ISLEEP  
VIN = 16 V, VPWM = VSYNC = 0 V  
2.0  
VIL  
VIH  
●
●
–
–
0.4  
–
V
V
Input Logic Level High  
1.5  
60  
60  
–
PWM Input Pull-Down Resistor  
APWM Input Pull-Down Resistor  
APWM  
REN  
VPWM = 5 V  
VPWM = VIH  
100  
100  
140  
140  
kΩ  
kΩ  
RAPWM  
APWM Frequency [2]  
fAPWM  
●
40  
–
1000  
kHz  
OUTPUT LOGIC LEVELS (CLKOUT)  
Output Logic Level Low  
Output Logic Level High  
ERROR AMPLIFIER  
VOL  
VOH  
5 V < VIN < 40 V  
5 V < VIN < 40 V  
●
●
–
–
–
0.3  
–
V
V
1.8  
Source Current  
IEA(source)  
IEA(sink)  
RCOMP  
VCOMP = 1.5 V  
–
–
–
–600  
+600  
1.4  
–
–
–
μA  
μA  
kΩ  
Sink Current  
VCOMP = 1.5 V  
COMP Pin Pull-Down Resistance  
OVERVOLTAGE PROTECTION  
OVP Pin Voltage Threshold  
OVP Pin Sense Current Threshold  
OVP Pin Leakage Current  
OVP Accuracy  
FAULT = 0, VCOMP = 1.5V  
VOVP(th)  
IOVP(th)  
OVP pin connected to VOUT  
Current into OVP pin  
●
●
●
7
190  
–
8.3  
200  
0.1  
–
9.5  
210  
1
V
μA  
μA  
%
V
IOVP(LKG)  
VIN = 16 V, PWM = L  
–
5
Measured at VOUT pin when ROVP = 160 kW [2]  
Measured at VOUT pin when ROVP = 0  
Measured at SW pin  
–
3
–
Undervoltage Protection Threshold  
Secondary Overvoltage Protection  
VUVP(th)  
–
0.55  
45  
0.7  
48  
V
VOVP(sec)  
●
42  
V
Continued on the next page…  
1 For input and output current specifications, negative current is defined as coming out of the node or pin (sourcing); positive current is defined as going into the node or pin  
(sinking).  
2 Ensured by design and characterization, not production tested.  
3 Minimum VIN = 4.5 V is only required at startup. After startup is completed, IC can continue to operate down to VIN = 3.9 V  
4 LED current is trimmed to cancel variations in both Gain and ISET voltage  
Allegro MicroSystems, LLC  
115 Northeast Cutoff  
6
Worcester, Massachusetts 01615-0036 U.S.A.  
1.508.853.5000; www.allegromicro.com  
1...3456789...35

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