SC5014A

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Pin Descriptions

Pin #

Pin

Name

Pin Function



UVLO

Input under-voltage lockout pin — Device is disabled when this pin is less than .23V (nominal). Add a resistor

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

2

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 a resistor divider from this pin to REF and

PGND programs the shorted-LED protection up to 20x the V

feature on all channels.

3

REF

.23V reference voltage output pin — Connect a µF ceramic bypass capacitor from this pin to ground.

4

FSET

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

2.2MHz.

5

NC

No connect. This can be left floating or connected to GND.

6

SCL

7

SDA

8

ISET

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

9

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.

0

PWMI

LED string PWM dimming control input.

 ~4

IO2 ~ IO

Regulated current sink LED channel 2 to channel  respectively . Connect the related IO pin to the cathode of the

bottom LED in string 2 to string  respectively. Connect the related IO pin to ground to disable the related LED

string during power on.

5

OVP

Over-voltage feedback pin — Over-voltage activated when pin voltage exceeds .2V. Use a resistor divider tied to

the output and GND to set the OVP level.

6

CS

Step-up (boost) switch current sense pin — Connect a resistor from this pin to ground for current sense - utilized in

peak current mode control loop and over-current sense circuitry.

7

PGND

Power ground — Tie this pin to the power ground plane close to input and output decoupling capacitors.

8

NDRV

Gate drive for the external step-up (boost) N-Channel MOSFET.

9

VCC

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

this pin to ground.

20

EN

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

current.

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PAD

AGND thermal pad for heatsinking purposes — It should be connected to ground plane for proper circuit operation.