MAX16801B datasheet(2/15 Pages) MAXIM

Part #	MAX16801B

Description	Off-Line and DC-DC PWM Controllers for High-Brightness LED Drivers

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Manufacturer	MAXIM [Maxim Integrated Products]

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Off-Line and DC-DC PWM Controllers for

High-Brightness LED Drivers

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN = +12V (MAX16801: VIN must first be brought up to +23.6V for startup), 10nF bypass capacitors at IN and VCC, CNDRV = 0,

VUVLO = +1.4V, VDIM/FB = +1.0V, COMP = unconnected, VCS = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are

at TA = +25°C.) (Note 1)

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.

IN to GND..........................................................................-0.3V to +30V

VCC to GND .....................................................................-0.3V to +13V

DIM/FB, COMP, UVLO, CS to GND..........................-0.3V to +6V

NDRV to GND.............................................-0.3V to (VCC + 0.3V)

Continuous Power Dissipation (TA = +70°C)

8-Pin µMAX (derate 4.5mW/°C above +70°C) ..............362mW

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

Storage Temperature Range ............................-65°C to +150°C

Junction Temperature ......................................................+150°C

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

UNDERVOLTAGE LOCKOUT/STARTUP

Bootstrap UVLO Wake-Up Level

VSUVR

VIN rising (MAX16801 only)

19.68

21.6

23.60

V

Bootstrap UVLO Shutdown Level

VSUVF

VIN falling (MAX16801 only)

9.05

9.74

10.43

V

UVLO/EN Wake-Up Threshold

VULR2

UVLO/EN rising

1.188

1.28

1.371

V

UVLO/EN Shutdown Threshold

VULF2

UVLO/EN falling

1.168

1.23

1.291

V

UVLO/EN Input Current

IUVLO

TJ = +125°C

25

nA

UVLO/EN Hysteresis

50

mV

IN Supply Current In

Undervoltage Lockout

ISTART

VIN = +19V, for MAX16801 only when in

bootstrap UVLO

45

90

µA

IN Voltage Range

VIN

10.8

24

V

tEXTR

UVLO/EN steps up from +1.1V to +1.4V

12

UVLO/EN Propagation Delay

tEXTF

UVLO/EN steps down from +1.4V to +1.1V

1.8

µs

tBUVR

VIN steps up from +9V to +24V

5

Bootstrap UVLO Propagation

Delay

tBUVF

VIN steps down from +24V to +9V

1

µs

INTERNAL SUPPLY

VCC Regulator Set Point

VCCSP

VIN = +10.8V to +24V, sinking 1µA to 20mA

from VCC

7

10.5

V

IN Supply Current After Startup

IIN

VIN = +24V

1.4

2.5

mA

Shutdown Supply Current

UVLO/EN = low

90

µA

GATE DRIVER

RON(LOW)

Measured at NDRV sinking, 100mA

2

4

Driver Output Impedance

RON(HIGH) Measured at NDRV sourcing, 20mA

4

12

Ω

Driver Peak Sink Current

1A

Driver Peak Source Current

0.65

A

PWM COMPARATOR

Comparator Offset Voltage

VOPWM

VCOMP - VCS

1.15

1.38

1.70

V

CS Input Bias Current

ICS

VCS = 0V

-2

+2

µA

Comparator Propagation Delay

tPWM

VCS = +0.1V

60

ns

Minimum On-Time

tON(MIN)

150

ns

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