MAX17149ETE+【PDF 2/21 页】IC LED DRVR 6CH STEP UP 16QFNEP

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Sheet目录340

1页 [2页]3页 4页 5页 6页

Low-Cost, 6-String WLED Drivers with

Quick-PWM Step-Up Converter

ABSOLUTE MAXIMUM RATINGS

FSEL, IN, BRT, EN to GND ..................................-0.3V to +28V

FB_, LX, OVP to PGND .........................................-0.3V to +48V

PGND to GND ......................................................-0.3V to +0.3V

V CC to GND.............................................................-0.3V to +6V

ISET to GND ............................................... -0.3V to VCC + 0.3V

LX Switch Continuous RMS Current.....................................1.6A

Continuous Power Dissipation (T A = +70 N C)

16-Pin Thin QFN (derate 14.7mW/ N C above +70 N C) .. 1176mW

Operating Temperature Range .......................... -40 N C to +85 N C

Junction Temperature .....................................................+150 N C

Storage Temperature Range............................ -60 N C to +150 N C

ESD

HBM .................................................................................±2kV

MM ................................................................................ ±200V

Lead Temperature (soldering, 10s) ................................+300 N C

Soldering Temperature (reflow) ......................................+260 N C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1. V IN = 12V, R ISET = 100k I , T A = 0°C to +85°C , unless otherwise noted. Typical values are at T A = +25 N C.) (Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IN Input Voltage Range

IN Standby Current

IN not connected to V CC

IN connected to V CC

V EN = 3V, V IN = 26V, no external loads

V EN = 0V, V IN = 26V

3.0

3.2

0.1

5.5

μA

V CC Output Voltage

V CC Current Limit

V CC UVLO Threshold

IN UVLO Threshold

V EN = 3V, 0 < I VCC < 10mA

V CC is forced to 3.5V; IN not connected to V CC

Rising edge, typical hysteresis = 100mV

Rising edge, typical hysteresis = 100mV;

IN not connected to V CC

3.6

2.75

5.5

3.8

2.8

5.75

4.0

2.85

5.9

STEP-UP CONVERTER

LX On-Resistance

LX Leakage Current

100mA from LX to PGND

V LX = 40V, T A = +25NC

250

0.05

500

mω

μA

Off-Time

LX Peak Current Limit

FSEL = GND, V IN = 12V, V OVP = 22V

FSEL = V CC , V IN = 12V, V OVP = 22V

Duty cycle = 75%

450

900

2.5

500

1000

550

1100

3.5

Minimum On-Time

Minimum Output Regulation

Voltage

Maximum Output Regulation

Voltage

MAX17129 only

MAX17149 only

MAX17129 only

MAX17149 only

6.8

41.5

23.9

16.5

8.3

25.4

9.8

44.5

26.9

INPUT LEAKAGE/BIAS CURRENTS

EN Bias Current

BRT Bias Current

EN Input Impedance

0.3V < V EN < 3.5V, T A = +25°C

4.1V < V EN < 26V, T A = +25°C

0.3V < V BRT < 3.5V, T A = +25°C

4.1V < V BRT < 26V, T A = +25°C

750

1500

110

2000

μA

kω

OVP Input Current

FSEL Bias Current

MAX17129 only; V OVP = 40V, V FB = 0.75V

MAX17149 only; V OVP = 20V, V FB = 0.75V

0.3V < V FSEL < 3.5V, T A = +25°C

4.1V < V FSEL < 26V, T A = +25°C

7.5

2000

μA

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