PT6937 Datasheet, PDF (11/15 Pages) Princeton Technology Corp – White LED Step-Up Converter

White LED Step-Up Converter
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PT6937
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Rating
Unit
Input voltage
VIN
5
V
SW voltage
33
V
FB voltage
5
V
/SHDN voltage
5
V
Operating temperature
Topr
-40 to +85
Ċ
Storage temperature
Tstg
-65 to +150
Ċ
Maximum junction temperature
125
Ċ
Lead temperature (Soldering, 10 sec.)
300
Ċ
Note:
Absolute Maximum Ratings are those values beyond which the life of the device may be impaired.
ELECTRICAL CHARACTERISTICS
(unless otherwise specified, Ta=25Ċ, VIN=3V, V /SHDN=3V,.
Parameter
Conditions
Minimum operating voltage
Maximum operating voltage
Feedback voltage
ISW=100mA, Duty cycle=66%
FB pin bias current
Supply current
Switching frequency
Maximum duty cycle
Switch current limit
Switch VCESAT
Switch leakage current
/SHDN voltage high
/SHDN voltage low
/SHDN pin bias current
/SHDN=0V
ISW=250mA
VSW=30V
Min.
2.5
86
0.8
84
300
1.3
Typ.
95
5
0.8
0.1
1.2
87
350
350
0.1
-
20
Max.
5.5
104
10
1.2
1.0
1.6
90
400
380
1
-
0.5
30
Unit
V
V
mV
nA
mA
µA
MHz
%
mA
mV
µA
V
V
µA
Note:
The PT6937 is guaranteed to meet specifications from 0Ċ to 70Ċ. Specifications over the -40Ċ to
85Ċ operating temperature range are assured by design, characterization and correlation with
statistical process controls.
PT6937 V1.1
- 11 -
March, 2006