HV9912NG-G-M901 datasheet(5/20 Pages) MICROCHIP

Part #	HV9912NG-G-M901

Description	Switch-Mode LED Driver IC with High Current Accuracy and Hiccup Mode Protection

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DS20005583A-page 5

HV9912

Load Regulation of Reference

Voltage

VREFLOAD

0

—

10

mV

REF bypassed with a 0.1 µF

capacitor to GND;



IREF = 0 µA–500 µA; 

PWMD = GND

PWM DIMMING

PWMD Input Low Voltage

VPWMD(LO)

—

0.8

V

Note 2

PWMD Input High Voltage

VPWMD(HI)

2

—

V

Note 2

PWMD Pull-down Resistance

RPWMD

50

100

150

kΩ

VPWMD = 5V

GATE

GATE Short-circuit Current

ISOURCE

0.2

—

A

VGATE = 0V

GATE Sinking Current

ISINK

0.4

—

A

VGATE = VDD

GATE Output Rise Time

TRISE

—

50

85

ns

CGATE = 1 nF

GATE Output Fall Time

TFALL

—

25

45

ns

CGATE = 1 nF

OVERVOLTAGE PROTECTION

Overvoltage Rising Trip Point

VOVP,RISING 4.75

5

5.25

V

OVP rising

Overvoltage Hysteresis

VOVP,HYST

—

0.5

—

V

OVP falling

CURRENT SENSE

Leading Edge Blanking

TBLANK

100

—

280

ns

0°C < TA < +85°C

100

—

330

–40°C < TA < +125°C

Delay to Output of COMP Comparator

TDELAY1

—

200

ns

COMP = VDD; CLIM = REF;

CSENSE = 0 mV to 600 mV 

(step up)

Delay to Output of CLIMIT Comparator

TDELAY2

—

200

ns

COMP = VDD; CLIM = 300 mV;

CSENSE = 0 mV to 400 mV

(step up)

Comparator Offset Voltage

VOFFSET

–10

—

10

mV

INTERNAL TRANSCONDUCTANCE OPAMP

Gain Bandwidth Product

GBW

—

1

—

MHz

75 pF capacitance at OP pin

(Note 3)

Open-loop DC Gain

AV

60

—

dB

Output open

Input Common Mode Range

VCM

–0.3

—

3

V

Note 3

Output Voltage Range

VO

0.7

—

6.75

V

Note 3

Transconductance

gM

450

550

650

µA/V

Input Offset Voltage

VOFFSET

–5

—

5

mV

Input Bias Current

IBIAS

—

0.5

1

nA

Note 3

OSCILLATOR

Oscillator Frequency

fOSC1

99

106

118

kHz

RT = 500 kΩ (Note 2)

fOSC2

510

580

650

kHz

RT = 96 kΩ (Note 2)

Maximum Duty Cycle

DMAX

87

—

93

%

ELECTRICAL CHARACTERISTICS (CONTINUED)

Electrical Specifications: TA = 25°C and VIN = 12V unless otherwise specified.

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Note 1: See Section 3.3 “Minimum Input Voltage at VIN Pin” for the minimum input voltage.

2: The specifications which apply over the full operating temperature range at



–40°C < TA < +85°C are guaranteed by design and characterization.

3: For design guidance only

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