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STLA02 数据表(PDF) 7 Page - STMicroelectronics

部件名 STLA02
功能描述  White LED driver for display backlight
PDF  23 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STLA02 数据表(HTML) 7 Page - STMicroelectronics

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STLA02
Electrical characteristics
Doc ID 010005 Rev 1
7/23
5
Electrical characteristics
VEN = VIN = 3 V TA = - 40 °C to 85 °C unless otherwise specified. Typical values are at
TA = 25 °C, unless otherwise specified.
Table 7.
Electrical characteristics
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VIN
Input operating supply
voltage
2.5
18
V
IS
Supply current
VEN = VIN, VOUT = 24 V, VFB = 23 V
2
4
mA
VEN = GND
10
µA
IO
Output current
adjustment
VIN = 2.5 V to 18 V, RFB = 10 Ω
20
mA
VOUT
Regulated voltage range
VIN = 2.5 V to 18 V
VIN+1
27
V
IPEAK
Inductor peak current
VIN = 2.5 V
300
400
550
mA
VFB
Feedback voltage (VOUT -
VFB)
VEN = VIN, RFB = 10 Ω
190
200
210
mV
IFB
FB bias current
VEN = VIN, VOUT = 24 V, VFB = 24 V
6
µA
ILX(leak)
N-MOS leakage current
VEN = 0, VLX = VOUT = 24 V
0.1
µA
ΔI
O
Output current tolerance
VIN = 3 V, IOUT = 0.2 V / RFB
-5
5
%
fs
Switching frequency
VIN = 2.5 V, TA = 25 °C
1.7
2
2.3
MHz
DMAX
Maximum duty cycle
VEN = VIN, VOUT = 24 V, VFB = 24 V
88
92
%
RDSon-N
Internal N-channel RDSon ILX = 20 mA
0.8
Ω
ν
Efficiency of the chip itself
VIN = 10 V, IO = 20 mA, VO = 6 x
VFLED_max + VRSENSE = 24 V
(1)
85
%
ν
Efficiency of the whole
application
VIN = 10 V, IO = 20 mA, VO = 6 x
VFLED_max + VRSENSE = 24 V
(1)
83
%
OVP
Output overvoltage
protection
VIN = 3 V, no load
28
V
TSHDN
Thermal shutdown
130
150
°C
THYS
Thermal shutdown
hysteresis
15
°C
VIL
Low and high level input
logic signal on EN pin
VIN = 2.5 V to 18 V, VENMAX = 12 V
01.5
V
VIH
1.8
VIN
TEN
LED current rise time ILED
= 0 to ILED = 20 mA
VIN = 9 V, VEN = 0 V to 3 V 6 LEDs in
series (1)
0.2
ms
TRESPONSE
LED current rise time ILED
= 0 mA to ILED = 20 mA
VIN = 9 V, VEN = 0 V to 3 V, 6 LEDs in
series (1), VOUT precharged
60
µs
1.
Guaranteed by design, but not tested in production.



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