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STLD20D-DEF 数据表(PDF) 4 Page - STMicroelectronics

部件名 STLD20D-DEF
功能描述  WHITE LED POWER SUPPLY
PDF  8 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STLD20D-DEF 数据表(HTML) 4 Page - STMicroelectronics

  STLD20D-DEF Datasheet HTML 1Page - STMicroelectronics STLD20D-DEF Datasheet HTML 2Page - STMicroelectronics STLD20D-DEF Datasheet HTML 3Page - STMicroelectronics STLD20D-DEF Datasheet HTML 4Page - STMicroelectronics STLD20D-DEF Datasheet HTML 5Page - STMicroelectronics STLD20D-DEF Datasheet HTML 6Page - STMicroelectronics STLD20D-DEF Datasheet HTML 7Page - STMicroelectronics STLD20D-DEF Datasheet HTML 8Page - STMicroelectronics  
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STLD20D
4/8
Table 4: Electrical Characteristics (for VIN = 2.8 to 4.2V and Tj = 25°C)
Table 5: Thermal Characteristics
Symbol
Parameter
Test conditions
Value
Unit
Min. Typ. Max.
VIN
Operating Input voltage range
2.8
4.2
V
IOUT
Average regulated current IOUT = 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
0.51
0.6
Ω
VIN = 4.2V
0.45 0.49
QFN
Tj = 25°C
ISW = 250mA
VIN = 2.8V
0.65
VIN = 4.2V
0.55
LDS
Load disconnect switch
RDSON
SOT23-8L Tj = 25°C
ILDS = 20mA
VIN = 2.8V
5.5
6.1
Ω
VIN = 4.2V
4.7
5.2
QFN
Tj = 25°C
ILDS = 20mA
VIN = 2.8V
6.2
VIN = 4.2V
5.3
FB
Feedback voltage
0.285 0.300 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
Circuit configura-
tion (figure 1)
L: Murata
LQH32CN100K33
Diode: BAT20J
VIN = 2.8V
80
%
VIN = 4.2V
85
Switching
frequency
400
500
600
kHz
DCMIN
Minimum duty cycle
22
25
%
ILIM
Peak current boost switch
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
Symbol
Parameter
Value
Unit
Min.
Typ. Max.
Rth(j-a)
Mounted on epoxy board without
copper heatsink
SOT23-8L
300
°C/W
QFN
350



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