DA6250.007

13 April, 2018

21 (24)

DEVICE OUTLINE CONFIGURATION

Top Marking Information:

6250 = Product Number

VVV = Version Number

YWW = Year Week

QFN-16 3.0x3.0x0.75 PIN DESCRIPTION

Pin Name

Pin

Type

Function

Note

RLED

1

AIO

LED current adjustment resistor

ILED

2

AO

LED current sink

GND

3-4

G

Supply ground pin

VOUT

5-6

AO

Boost DC/DC converter voltage output

PS

7

P

Power save pin

1

VIN

8

P

Positive supply voltage input

SW

9-10

AO

Boost DC/DC converter switch

VOP

11

AO

Inverted piezo driver output

VON

12

AO

Non-inverted piezo driver output

ROSC

13

AIO

Self-drive oscillator frequency adjustment resistor

2

DIN

14

DI

DC/DC and Piezo Drive ON (HIGH) / OFF (LOW) control

CTRL

15

DI

LED current sink ON (HIGH) / OFF (LOW) control

FB

16

AI

Boost DC/DC converter output voltage feedback input

EXP_PAD

-

G

Exposed thermal pad connected to GND

3

G = Ground, P = Power, D = Digital, A = Analog, I = Input, O = Output

Note 1: Normally the PS pin is connected to VIN. This offers reduced power consumption as part of electrical charge from piezo load is

transferred back to input. In case the VOUT voltage is below 7V the PS pin should be connected GND for best efficiency. For example when

driving only one or two 3V LEDs the PS pin should be connected to GND. See figures 4 and 10.

Note 2: For external drive mode connect ROSC to VIN. For self-drive mode connect frequency adjustment resistor from ROSC pin to GND.

Note 3: On PCB the exposed thermal pad must be connected to GND plane using thermal vias functioning as thermal heat sink.