PT4115 查看數據表（PDF） - Unspecified
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PT4115 Datasheet PDF : 18 Pages
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PT4115
30V, 1.2A Step-down High Brightness
LED Driver with 5000:1 Dimming
RECOMMENDED OPERATING RANGE
SYMBOL
VIN
TOPT
ITEMS
VDD Supply Voltage
Operating Temperature
VALUE
6 ~ 30
-40 to +85
UNIT
V
oC
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended
Operating Range indicates conditions for which the device is functional, but do not guarantee specific performance
limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Range. Specifications are
not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device
performance.
Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA,
and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA)/ θJA or the
number given in Absolute Maximum Ratings, whichever is lower.
Note 3: Human body model, 100pF discharged through a 1.5kΩ resistor.
ELECTRICAL CHARACTERISTICS (Note 4, 5)
The following specifications apply for VIN=12V, TA=25 oC, unless specified otherwise.
SYMBOL
ITEMS
CONDITIONS
VIN
VUVLO
VUVLO, HYS
FSW
Input Voltage
Under voltage lock out
UVLO hysterisis
Max. Switching Frequency
VIN falling
VIN rising
Current Sense
VCSN
Mean current sense
threshold voltage
VIN-VCSN
A type
B type
VCSN_hys
Sense threshold hysteresis
ICSN
CSN Pin Input Current
Operating Current
VIN-VCSN=50mV
Quiescent supply current
IOFF
with output off
VDIM<0.3V
DIM Input
VDIM
VDIM_H
VDIM_L
VDIM_DC
fDIM
DPWM_LF
Internal supply voltage
DIM floating
DIM input voltage High
DIM input voltage Low
DC brightness control
Max. DIM Frequency
Duty cycle range of low
frequency dimming
fOSC=500kHz
fDIM =100Hz
Brightness control range
Min.
6
Typ.
5.1
500
95
98
99
102
±15
8
95
5
2.5
0.5
0.02%
5000:1
Max.
30
1
101
105
0.3
2.5
50
1
UNIT
V
V
mV
MHz
mV
mV
%
µA
µA
V
V
V
V
kHz
China Resources Powtech (Shanghai) Limited
PT4115_DS Rev EN_2.9
WWW.CRPOWTECH.COM
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