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STLD20D-DEF Arkusz danych(PDF) 8 Page - STMicroelectronics

Numer części STLD20D-DEF
Szczegółowy opis  White LED power supply
PDF  31 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLD20D-DEF Arkusz danych(HTML) 8 Page - STMicroelectronics

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Electrical characteristics
STLD20D
8/31
4
Electrical characteristics
Table 4.
Electrical characteristics (VIN = 2.8 to 4.2V and TJ = 25°C)
Symbol
Parameter
Test conditions
Value
Unit
Min.
Typ.
Max.
VIN
Operating Input voltage range
2.8
4.2
V
ILED
Average regulated current ILED = 20mA RLED = 15Ω
19
20
21
mA
ISD
Stand-by current
SHDN = low
VIN = 4.2V
1
µA
IQ
Quiescent current consumption
SHDN = high
VIN = 4.2V
0.43
0.6
mA
SW
Boost switch
RDSON
SOT23-8L
TJ = 25°C
ISW = 250mA
VIN = 2.8V
0.48
Ω
VIN = 4.2V
0.38
QFN
TJ = 25°C
ISW = 250mA
VIN = 2.8V
0.57
VIN = 4.2V
0.42
LDS
Load Disconnect
Switch RDSON
SOT23-8L
TJ = 25°C
ILDS = 20mA
VIN = 2.8V
5.0
Ω
VIN = 4.2V
4.2
QFN
TJ = 25°C
ILDS = 20mA
VIN = 2.8V
5.1
VIN = 4.2V
4.3
FB
Feedback voltage
0.285
0.302
0.315
V
Line
Variation of the LED current versus the input voltage:
RLED = 15Ω
0.9
mA/V
Eff
Efficiency with 4 LEDS, VOUT = 16V
VIN = 2.8V
80
%
VIN = 4.2V
85
fSW
Switching frequency
400
500
600
kHz
DCMIN
Minimum duty cycle
20
%
ILIM
Peak current boost switch (1)
L = 10µH
RSET = GND (STLD20D-C8)
640
mA
OVP
Overvoltage protection
17.5
18.5
20
VDC
HystOV
Overvoltage hysteresis
0.7
VDC
OTP
Over temperature protection
110
°C
HystOT
Over temperature protection hysteresis
5
°C
SHDN
Shutdown signal logic
Disable Low
VIL
0.3
V
Enable high
VIH
1.2
1.
Guaranteed by design.



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