PT4115 SOT-89-5

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PT4115 Step-Down High Brightness LED Driver

 

Basic Information
ManufacturerPowerTech
Package:SOT-89-5
DataSheet:CLICK HERE TO DOWNLOAD
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FEATURES

Simple low parts count

Wide input voltage range: 8V to 30V

Up to 1.2A output current

Single pin on/off and brightness control using DC voltage or PWM

Up to 1MHz switching frequency

Typical 5% output current accuracy

Inherent open-circuit LED protection

High efficiency (up to 97%)

High-Side Current Sense

Hysteretic Control: No Compensatio

Adjustable Constant LED Current

APPLICATION

Low voltage halogen replacement LEDs

Automotive lighting

Low voltage industrial lighting

LED back-up lighting

Illuminated signs

SELV lighting

LCD TV backlighting

SYMBOLITEMSVALUEUNIT
VinSupply Voltage-0.3~+45V
SWDrain of the internal power switch-0.3~+45V
CSNCurrent sense input(Respect to VIN)+0.3~(-6.0)V
DIMLogic level dimming input-0.3~6V
IswSwitch ouput current1.5A
PdmaxPower Dissipation1.5W
PtrThermal Resistance45°C/W
TjOperation Junction Temperature-40 to 150°C
TstqStorage Temperature-55 to 150°C
SYMBOLITEMSCONDITIONSMINTYPMAXUNIT
VinInput Voltage830V
VuvloUnder Voltage lock outVin falling6.8V
Vuvlo,hysUVLO hysterisisVin rising500mV
FswMAX Switching Frequency1MHz
Current Sense
VcsnMean current sense threshold voltageVin-VcsnA type:95

B type:99

98

102

101

105

mV

mV

Vcsn_hysSense threshold hysterisis  +-15 %
IcsnCSN Pin Input CurrentVin-Vcsn=50mV 8 μA
Operating Current
IoffQuiescent supply current with output offVdim<0.3V 95 μA
DIM Input
VdimInternal supply voltageDIM floating 5 V
Vdim_HDIM input voltage High 2.5  V
Vdim_LDIM input voltage Low   0.3V
Vdim_DCDC brightness control 0.5 2.5V
FdimMAX DIM FrequencyFosc<=500KHz  50KHz
Dpwm_LPDuty cycle range of low frequency dimming

Brightness control range

Fdim=100Hz

 

0.02%

 

 

5000:1

1

 

 

 

Dpwm_HPDuty cycle range of high frequency dimming

Brightness control range

Fdim=20KHz

 

4%

 

 

25:1

1

 

 

 

RdimDIM pull up resistor to Internal supply voltage  200 
Idim_LDIM input leakage lowVdim=0 25 μA
Output Switch
RswSW On resistanceVin=12V 0.6 Ω
IswmeanContinuous SW Current  1.2 A
 
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