TS1937 데이터 시트보기 (PDF) - TSC Corporation
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TS1937 Datasheet PDF : 8 Pages
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TS1937
Boost (Step-up) WLED Driver
Absolute Maximum Rating
Parameter
Input Voltage
Supply Voltage (Recommended)
FB Voltage
SW Voltage
CTRL Voltage
Ambient Temperature Range
Junction Temperature Range
Symbol
VIN
VIN
VFB
VSW
VCTRL
TA
TJ
Limit
20
2.5 ~ 18
10
36
10
-40 to +85
-40 to +125
Unit
V
V
V
V
V
oC
oC
Electrical Specifications (Ta = 25oC, VIN= VCTRL=3V, CIN=1uF, COUT=0.22uF unless otherwise noted)
Function Parameter
Symbol
Test Conditions
Min Typ Max
Units
Input Voltage Range
VIN
2.5
--
18
V
Feedback Voltage
VFB
Isw=100mA, 66% duty cycle
86
95
104 mV
FB Pin Bias Current
IB
10
45
100
nA
Supply Current
Switching Frequency
IQ
FRSW
CTRL = 0V
--
1.9
--
0.1
0.8 1.2
2.5
mA
1.0
uA
1.6
MHz
Switch Current Limit
Maximum Duty Cycle
Switch Vcesat
Switch Leakage Current
Voltage Enable Control
CTRL Pin Bias Current
ICL
DTMX
VSAT
ILKG
VCTRL
ICTRL
At Isw = 250mA
Vsw = 5V
High
Low
Ctrl = 2V
--
320
--
mA
85
90
--
%
--
350
--
mV
--
0.01
5
µA
1.5
--
--
V
--
--
0.4
V
--
65
--
µA
Thermal Resistance
θJA
Note:
--
220
-- °C/W
Absolute maximum ratings are limits beyond which damage to the device may occur.
The maximum allowable power dissipation is a function of maximum function temperature, TJ(max), the junction to
ambient thermal resistance, θJA , and the ambient temperature. The maximum allowable, power dissipation at any
ambient temperature is calculated using: PD(MAX) = [TJ(max)-TA]/θJA . Exceeding the maximum allowable power dissipation
will cause excessive die temperature. All limits at temperature extremes are guaranteed via correlation using standard
statistical methods
2/8
Version: C07
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