SC5010

12

Pin Descriptions

Pin #

Pin Name

Pin Function

1VCC

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.

2EN

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

current.

3

UVLO

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.

4

SCP

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 20x the V

SCP

voltage. Pulling the pin high to VCC disables the

SCP feature on all channels.

5

BG

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

6

FSET

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

to 2.2MHz.

7

AGND

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

current path.

8

CPLL

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.

9SYNC

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.

10

SCL

11

SDA

12

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 15.

13

FLT

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

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.

14

PWMI

PWM dimming control input

15

IO8

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

Connect pin to ground to disable this LED string.

16

IO7

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

Connect pin to ground to disable this LED string.

17

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.

18

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.

19

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.