SC5010H View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SC5010H

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

Semtech Corporation 

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SC5010H

Pin Descriptions

Pin #

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

Pin Name Pin Function

VCC

EN

UVLO

SCP

BG

Input bias voltage supply for the IC — accepts 4.5-5.5V inputs. Add a 1µF or larger ceramic bypass capacitor from

this pin to ground.

Logic high enable pin — pull logic high to enable the device or pull low to disable and maintain low shutdown

current.

Input under-voltage lockout pin — Device is disabled when this pin is less than 1.23V (nominal). Add a resistor

divider from this pin to the input voltage and AGND, respectively.

Short circuit LED protection programming pin. Shorted LED protection disables the individual channel when the

current sink voltage exceeds the programmed voltage threshold. Adding resistor divider from this pin to BG and

AGND programs the shorted-LED protection up to 20 X the VSCP voltage. Pulling the pin high to VCC disables the

SCP feature on all channels.

1.23V bandgap output pin — Connect a 1µF ceramic bypass capacitor from this pin to ground.

FSET

AGND

CPLL

SYNC

Step-up (boost) frequency set pin — Connect a resistor from this pin to ground to set the frequency from 200kHz

to 2.2MHz.

Analog ground pin — tie this pin to analog (quiet) ground isolated from the step-up (boost) converter switching

current path.

Compensation for the internal PLL — connect a compensation resistor and capacitor from this pin to ground. This

pin can be left floating if not used.

SYNC input pin — feeding the SYNC signal (30Hz - 100kHz) to this input results in internal PLL being synchronized

to the SYNC signal. This pin can be left floating if not used.

SCL

I2C serial clock input — this pin must be connected to ground if not used.

SDA

I2C serial data input — this pin must be connected to ground if not used.

ISET

LED current programming pin — connect an external resistor to ground to program the current in the LED strings.

For more details please refer to LED String Peak Current Programming on page 16.

Logic low fault status pin — open-drain output is latched low when fault condition is detected: Open/Short LED,

FLT

Shorted String, OVP or OTP. Fault status can be reset by removing fault condition(s) and toggling the EN, VCC or

UVLO pins. This pin can be left floating if not used.

PWMI

PWM dimming control input

Regulated current sink LED channel 8 — connect this pin to the cathode of the bottom LED in string 8.

IO8

Connect pin to ground to disable this LED string.

Regulated current sink LED channel 7 — connect this pin to the cathode of the bottom LED in string 7.

IO7

Connect pin to ground to disable this LED string.

IO6

Regulated current sink LED channel 6 — connect this pin to the cathode of the bottom LED in string 6.

Connect pin to ground to disable this LED string.

IO5

Regulated current sink LED channel 5 — connect this pin to the cathode of the bottom LED in string 5.

Connect pin to ground to disable this LED string.

IO4

Regulated current sink LED channel 4 — connect this pin to the cathode of the bottom LED in string 4.

Connect pin to ground to disable this LED string.

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