MAX8709B Просмотр технического описания (PDF) - Maxim Integrated

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MAX8709B

High-Efficiency CCFL Backlight Controller with SMBus Interface

Maxim Integrated 

High-Efficiency CCFL Backlight

Controller with SMBus Interface

ABSOLUTE MAXIMUM RATINGS

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

BST1, BST2 to GND ...............................................-0.3V to +36V

BST1 to LX1, BST2 to LX2 ........................................-0.3V to +6V

GH1 to LX1 ..............................................-0.3V to (VBST1 + 0.3V)

GH2 to LX2 ..............................................-0.3V to (VBST2 + 0.3V)

VCC, VDD to GND .....................................................-0.3V to +6V

REF, ILIM to GND .......................................-0.3V to (VCC + 0.3V)

GL1, GL2 to GND .......................................-0.3V to (VDD + 0.3V)

CCI, CCV, LOT to GND ............................................-0.3V to +6V

IFB, ISEC, VFB to GND................................................-6V to +6V

SDA, SCL, SUS to GND............................................-0.3V to +6V

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

Continuous Power Dissipation (TA = +70°C)

28-Pin Thin QFN (derate 20.84mW/°C above +70°C) ..1667mW

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

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

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

Lead Temperature (soldering, 10s) .................................+300°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. VBATT = 12V, VLOT = VREF, VCC = VDD, VSUS = 5.3V, TA = 0°C to +85°C. Typical values are at TA = +25°C,

unless otherwise noted.)

PARAMETER

VBATT Input Voltage Range

VBATT Quiescent Current

VBATT Quiescent Current, Shutdown

VCC Output Voltage, Normal Operation

VCC Output Voltage, Shutdown

VCC Undervoltage-Lockout Threshold

VCC Undervoltage-Lockout Hysteresis

VCC Power-On Reset (POR) Threshold

VCC POR Hysteresis

REF Output Voltage, Normal Operation

GH1, GH2, GL1, GL2 On-Resistance

GH1, GH2, GL1, GL2 Output Current

BST1, BST2 Leakage Current

Input Resonant Frequency

Minimum Off-Time

Maximum Off-Time

Current-Limit Threshold

LX1 - GND, LX2 - GND (Fixed)

Current-Limit Threshold

LX1 - GND, LX2 - GND (Adjustable)

Minimum Current Threshold

LX1 - GND, LX2 - GND

CONDITIONS

MIN

VCC = VDD = VBATT

VCC = VDD = open

VSUS = 5.5V

SUS = GND

4.6

5.5

VBATT = 28V

VBATT = VCC = 5V

VSUS = 5.5V, 6V < VBATT < 28V,

0 < ILOAD < 20mA

5.0

SUS = GND, no load

3.5

VCC rising (leaving lockout)

VCC falling (entering lockout)

4.0

Rising edge

0.90

4.5V < VCC < 5.5V, ILOAD = 40µA

ITEST = 100mA, VCC = VDD = 5.3V

1.96

VBST_ = 12V, VLX_ = 7V

Guaranteed by design

25

180

18

ILIM = VCC

180

VILIM = 0.5V

80

VILIM = 2.0V

370

TYP MAX UNITS

5.5

V

28.0

1.5

3

mA

3

6

20

µA

5.35 5.5

V

4.6

5.5

V

4.5

V

200

mV

1.75 2.70

V

50

mV

2.00 2.04

V

9

18

Ω

0.5

A

5

µA

300

kHz

280 380

ns

28

38

µs

200 220

mV

100 120

mV

400 430

6

mV

2 _______________________________________________________________________________________

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