ZXLD1101 Datasheet, PDF (4/16 Pages) Zetex Semiconductors – ADJUSTABLE LED DRIVER WITH INTERNAL SWITCH IN TSOT23-5

ZXLD1101
PIN DESCRIPTION
PIN NO.
1
NAME
FB
2
GND
3
LX
4
V_IN
5
EN
DESCRIPTION
Feedback pin for current control loop (connect resistor R1
from this pin to GND for output current I=100mV/ R1)
Ground (0V)
Output of NDMOS switch
Input voltage (2.5V to 5.5V). Decouple with capacitor close
to device
Enable input (active high to turn on device)
Also used to adjust output current by PWM signal
Connect to Vin for permanent operation
BLOCK DIAGRAM
SEMICONDUCTORS
4
ISSUE 4 - JULY 2004