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STLD41 数据表(PDF) 7 Page - STMicroelectronics

部件名 STLD41
功能描述  White LED driver for mid-size LCD display backlight
PDF  19 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STLD41 数据表(HTML) 7 Page - STMicroelectronics

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STLD41
Electrical characteristics
Doc ID 022283 Rev 5
7/19
5
Electrical characteristics
CIN = 10 µF, COUT = 2.2 µF, L = 47 µH / 1.25 A, RSENSE = 1.3 Ω, TA = 25 °C, VIN = 5.5 V typ.
Values are at 25 °C, unless otherwise specified.
Table 6.
Electrical characteristics
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
VIN
Input operating supply
voltage
3.0
21
V
IO
Output current
adjustment range
VIN = 3.0 V to 5.0 V; VOUT = 38 V
40
mA
VIN = 5.0 V to 7.0 V; VOUT = 38 V
78
VIN = 7.0 V to 18 V; VOUT = 38 V
120
VOUT
Regulated voltage range
VIN = 3.0 V to 21 V
1.15*VIN
38
V
IPEAK
Inductor peak current
VIN = 3 V, VOUT = 38 V
2
A
ΔIO
Output current variation
VIN = 3 V, ILED = 120 mA
-10
10
%
IQ
Quiescent current in
Standby mode
EN = LOW, VIN = 5.5 V
1
µA
VFB
Feedback voltage
ILED = 120 mA, PWM_IN=HIGH
144
160
176
mV
VFBMIN Min. feedback voltage
PWM_IN = 30 kHz, duty cycle = 10%
35
mV
fs
Frequency
VIN = 3.0 V
1.4
MHz
ν
Efficiency of the chip itself
(1)
VIN = 7 to 21 V, IO = 120 mA,
VO = 10 x VFLED_max+VRSENSE = 38 V
87
%
ν
Efficiency of the whole
application (2)
VIN = 3 to 21 V, IO = 78 mA
79
%
OVP
Output overvoltage
protection
VIN = 21 V, No load
40
V
OTP
Overtemperature
protection
VIN = 21 V
140
°C
OTHYST
Overtemperature
hysteresis
VIN = 21 V
20
°C
VIL
Low and high level input
logic signal on EN pin
VIN = 3.0 V to 21 V
00.4
V
VIH
1.4
VI
IENHIGH Enable input current
VIN = 3.0 V to 21 V, VEN = 21 V
10
µA
TON
LED current rise time ILED
= 0 to ILED = max
VIN = 10 V
1
ms
fPWM
PWM dimming signal
frequency
VIN = 3.0 V to 21 V
25
50
kHz
VPWM
PWM signal level
VIN = 3.0 V to 21 V
1.4
5.5
V
1.
Calculated as (VOUT*ILED)/(VIN*IIN), guaranteed by design
2.
Calculated as (VLED*ILED)/(VIN*IIN), guaranteed by design



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