SC5010 Просмотр технического описания (PDF) - Semtech Corporation

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SC5010

High Efficiency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming

Semtech Corporation 

SC5010

Electrical Characteristics (continued)

Parameter

Symbol

Conditions

Min Typ Max Units

Boost Converter

CS Current Limit Threshold

Soft-start Time (1)

Boost Oscillator Frequency

Boost Oscillator Frequency

Maximum duty cycle

Output Disconnect Gate Drive

V

CS(ILIM)

t

SS

F

SW

F

OSC

D

MAX

From EN to end of soft start

R = 100kΩ

FSET

R Varies

FSET

0.36 0.40 0.44

V

4.4

ms

0.85

1

1.15 MHz

0.2

2.2 MHz

85

90

%

DRVP Sink Current

I

DRVP(L)

DRVP clamp voltage

V

CLAMP

DRVP Pin Leakage Current

I

LEAK

Control Signals: EN, PWMI, SYNC, SDA, SCL

DRVP = 12V

DRVP floating, V = V - V

CLAMP

IN DRVP

V = 27V, V = 0V

DRVP

EN

20

μA

5

7

8

V

0.1

1

μA

High Voltage Threshold

Low Voltage Threshold

SDA Output Low

Pin Leakage Current

VIH

V

IL

V

SDA(L)

I

LEAK

VCC = 4.5V to 5.5V

2.1

V = 4.5V to 5.5V

CC

-6mA from V to SDA

CC

V = 0V, V = V = V = V = V = V

EN

VSYNC

PWMI

ISET

FSET

SDA

SDL

-1

= 5.0V

V

0.8

V

0.3

V

1

μA

PWM Dimming Input

PWMI Input Dimming Frequency

SYNC Input Frequency

F

PWMI

F

SYNC

PWMI Input Resolution

Over-Voltage Protection

100Hz < F < 10kHz

PWMI

10kHz < F < 20kHz

PWMI

100

30k

Hz

30

100k Hz

10

bits

9

bits

OVP Trip Threshold Voltage

OVP Hysteresis

OVP Leakage Current

V

OVP(TRIG)

V

OVP(HYS)

I

OVP(LEAK)

OVP Rising

OVP Falling

OVP = 5V

1.1 1.2

1.3

V

10

mV

0.1

1

μA

4

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