L4075L-AF5-R 查看數據表（PDF） - Unisonic Technologies

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L4075L-AF5-R

40V LED DRIVER WITH INTERNAL SWITCH

Unisonic Technologies 

L4075

Preliminary

CMOS IC

„ ELECTRICAL CHARACTERISTICS (VIN=12V, TAMB=25°C unless otherwise stated) (Note 1)

PARAMETER

SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Input Voltage

VIN

6

40

V

Quiescent Supply Current with Output Off

IINQOFF ADJ Pin Grounded

40 60 80 μA

Quiescent Supply Current with Output

Switching

IINQON ADJ Pin Floating

450 600 μA

Mean Current Sense Threshold Voltage

VSENSE

113

mV

Sense Threshold Hysteresis

VSENSEHYS

±15

%

ISENSE Pin Input Current

ISENSE VSENSE=0.1V

8

10 μA

Internal Reference Voltage

Measured on ADJ Pin with

VREF Pin Floating

1.2

V

External Control Voltage Range On ADJ Pin

for DC Brightness Control

VADJ

0.3

1.2 V

DC Voltage On ADJ Pin to Switch Chip from

Active (On) State to Quiescent (Off) State

VADJOFF VADJ Falling

0.15 0.2 0.25 V

DC Voltage On ADJ Pin to Switch Chip from

Quiescent (Off) State to Active (On) State

VADJON VADJ Rising

0.2 0.25 0.3 V

Resistance Between ADJ Pin and VREF

RADJ

500

KΩ

Continuous LX Switch Current

ILXmean

0.35

A

LX Switch Leakage Current

ILX(leak)

1 μA

LX Switch “On” Resistance

RLX

0.9 1.5 Ω

Minimum Switch “ON” Time

TONMIN LX Switch “ON”

200

ns

Minimum Switch “OFF” Time

TOFFMIN LX Switch “OFF”

200

ns

PWM Frequency=100Hz,

Brightness Control Range at Low Frequency

PWM Signal

PWM Amplitude=5V,

DPWM(LF) VIN=15V, Driving 1LED,

L=27μH

1200:1

PWM Frequency=10KHz,

Brightness Control Range at Low Frequency

PWM Signal

PWM Amplitude=5V,

DPWM(HF) VIN=15V, Driving 1LED,

L=27μH

13:1

ADJ Pin Floating L=100Μh

Operating Frequency

fLX (0.82Ω) IOUT=350mA @

154

KHz

VLED=3.4V Driving 1 LED

Recommended Maximum Operating

Frequency

fLXMAX

1 MHz

Recommended Duty Cycle Range of Output

Switch at fLXmax

DLX

0.3 0.7 0.9

Internal Comparator Propagation Delay

TPD

50

ns

Thermal Shutdown Temperature

TSD

140

°C

Thermal Shutdown Hysteresis

TSD-HYS

20

°C

Note: Production testing of the chip is performed at 25°C. Functional operation of the chip and parameters specified

are guaranteed by design, characterization and process control in other temperature.

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

4 of 5

QW-R125-030.a

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