ISL97676 查看數據表（PDF） - Renesas Electronics

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ISL97676

6-Channel LED Driver with Phase Shift Control

Renesas Electronics 

ISL97676

Electrical Specifications All specifications below are tested at TA = +25°C; VIN = 12V, EN = 3.3V, RISET = 19.6k, unless otherwise noted.

Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)

SYMBOL

PARAMETER

CONDITION

MIN

(Note 8) TYP

MAX

(Note 8) UNIT

IOUT/VIN

DMAX

Line Regulation

Boost Maximum Duty Cycle

FSW < 0.5 * VDDIO

FSW > 0.5 * VDDIO

0.1

%

91

%

82

%

DMIN

Boost Minimum Duty Cycle

FSW < 0.5 * VDDIO

FSW > 0.5 * VDDIO

8.5 %

16.5 %

FSW

Boost Switching Frequency

FSW <0.5 * VDDIO

FSW >0.5 * VDDIO

475

600

640 kHz

950 1200 1280 kHz

ISW_leakage SW Leakage Current

SW = 45V, EN = 0

10 µA

CURRENT SOURCES

IMATCH

IACC

VHEADROOM

DC Channel-to-Channel Current Matching

RISET = 19.6k,

(IOUT = 20mA)

RISET = 39.2k,

(IOUT = 10mA)

Current Accuracy

RISET = 19.6k,

(IOUT = 20mA)

Dominant Channel Current Source Headroom at

FBx Pin

-1.5

+1.5 %

-1.5

+1.5 %

-1.5

+1.5 %

500

mV

(Note 10)

VHEADROOM_RANGE Dominant Channel Current Sink Headroom

Range at FBx Pin

ILED = 20mA, TA = +25°C

90

mV

VISET

ILEDmax

Voltage at ISET Pin

Maximum LED Current per Channel

PWM INTERFACE

6-Channel, VIN = 4.5V, VOUT = 40V,

FSW = 600kHz

1.2

1.22

1.24 V

30

mA

VIL

VIH

FPWMI

Guaranteed Range for PWM Input Low Voltage

Guaranteed Range for PWM Input High Voltage

PWMI Input Frequency Range

0.8

V

1.5

V

100

30,000 Hz

PWMACC

PWMI Input Accuracy

8

bits

PWMHYST

PWMI Input Allowable Jitter Hysteresis

-0.46

+0.46 LSB

PWM GENERATOR

FPWM

PWM Dimming Frequency Range

RFPWM = 1.5M

45

50

55 Hz

RFPWM = 1.5k

33

37

39 kHz

VRFPWM

Voltage at RFPWM Pin

1.19 1.22

1.24 V

tMIN

Minimum On Time

FAULT DETECTION

Direct PWM Mode

250

350 ns

VSC

VTEMP_ACC

VTEMP_SHDN

VOVPlo

OVPFAULT

IFAULT

VFAULT

Channel Short Circuit Threshold

Over-Temperature Threshold Accuracy

Over-Temperature Shutdown

Overvoltage Limit on OVP Pin

OVP Short Detection Fault Level

Fault Pull-down Current

Fault Clamp Voltage with Respect to VIN

VIN = 12V

VIN = 12, VIN - VFAULT

3.15

1.2

8

6

3.6

5

150

1.22

350

15

7

4.3

V

°C

°C

1.24 V

mV

25 µA

8.3

V

FN7600 Rev.2.00

Sep 12, 2017

Page 6 of 19

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