AP5726WG-7 Diodes Inc, AP5726WG-7 Datasheet - Page 2

• Manufacturer Part Number: AP5726WG-7
• Description: Switching Converters, Regulators & Controllers WH LED STEP-UP DC/DC CONV 2-6 LED
• Manufacturer: Diodes Inc
• Series: -r

Specifications of AP5726WG-7

• Constant Current: Yes
• Constant Voltage: -
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 1MHz ~ 1.4MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: -
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pin Descriptions
Functional Block Diagram
AP5726
Document number: DS31845 Rev. 3 - 2
Pin Name
GND
OVP
EN
V IN
SW
FB
EN
FB
V
IN
3
6
4
Description
Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI.
GND pin.
Feedback Pin. Reference voltage is 0.31V. Connect cathode of lowest LED and a sense
resister here. Calculate resistor value according to the formula: R
Converter On/Off Control Input. A high input at EN turns the converter On, and a low input
turns it off. If On/Off control is not needed, connect EN to the input source for automatic
startup. The EN pin cannot be left floating.
Output Voltage detect pin for over voltage protection.
Input Supply Pin. Must be locally bypassed with 1μF or 2.2μF to reduce input noise.
Enable
-
A1
0.31V
V
+
REF
Rc
Cc
Generator
Oscillator
1.2MHz
RAMP
www.diodes.com
Σ
2 of 17
OTP
A2
Comparator
WHITE LED STEP-UP CONVERTER
CONTROL
LOGIC
OVP
5
SET
= 0.31V / ILED
Driver
1
2 GND
AP5726
Q1
© Diodes Incorporated
SW
July 2010