AP5726WUG-7 Diodes Inc, AP5726WUG-7 Datasheet

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AP5726WUG-7

Manufacturer Part Number
AP5726WUG-7
Description
Switching Converters, Regulators & Controllers WH LED STEP-UP DC/DC CONV 2-6 LED
Manufacturer
Diodes Inc
Datasheet

Specifications of AP5726WUG-7

Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Features
Description
The AP5726 is a step-up DC/DC converter specifically
designed to drive white LEDs with a constant current. The
device can drive 2 ~ 6 LEDs in series from a Li-Ion cell.
Series connection of the LEDs provides identical LED
currents resulting in uniform brightness and eliminates the
need for ballast resistors. For driving higher number of LEDs,
AP5726 also supports a single feedback of parallel
connected multiple strings of equal number of LEDs.
The AP5726 switches at 1.2MHz that allows the use of tiny
external components. A low 0.31V feedback voltage
minimizes power loss in the current setting resistor for better
efficiency.
Notes:
Typical Application Circuit
AP5726
Document number: DS31845 Rev. 3 - 2
Fast 1.2MHz switching frequency
Current limit and UVLO protections
Internal Thermal Shutdown
Internal Over Voltage Protection
Integrated soft-start function
SOT26, TSOT23-6 and DFN2020C-6: Available in
“Green” Molding Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
High efficiency: 84% typical
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
PWM Dimming
ON
OFF
V
IN
1uF
C
IN
Figure 1. Typical Application Circuit
EN
V
AP5726
22uH
IN
GND
L1
www.diodes.com
SW
1 of 17
OVP
FB
D1
Pin Assignments
Applications
GND
SW
FB
PDAs, Hand help Computers
Digital Cameras
MP3 Players
GPS Receivers
Cellular Phones
SOT26 / TSOT23-6
1
2
3
(Top View)
WHITE LED STEP-UP CONVERTER
15
R
SET
2~6 LEDs
5
7 4
6
V
OVP
EN
IN
OVP
SW
V
IN
C
OUT
DFN2020C-6
1uF
(Top View)
1
2
3
AP5726
© Diodes Incorporated
July 2010
6
5
4
GND
FB
EN

Related parts for AP5726WUG-7

AP5726WUG-7 Summary of contents

Page 1

... PDAs, Hand help Computers • Digital Cameras • MP3 Players • GPS Receivers L1 D1 22uH C IN 1uF OVP AP5726 EN FB GND Figure 1. Typical Application Circuit www.diodes.com AP5726 (Top View GND 5 OVP OVP EN DFN2020C-6 C OUT 1uF 2~6 LEDs R SET 15 July 2010 © Diodes Incorporated ...

Page 2

... Input Supply Pin. Must be locally bypassed with 1μF or 2.2μF to reduce input noise. IN Functional Block Diagram REF 0.31V Enable 4 EN AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER OVP 5 Comparator A2 CONTROL LOGIC Rc OTP Cc Σ RAMP Generator 1.2MHz Oscillator www.diodes.com AP5726 = 0.31V / ILED SET 1 SW Driver Q1 2 GND July 2010 © Diodes Incorporated ...

Page 3

... Operating Ambient Temperature A AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER Parameter Parameter www.diodes.com AP5726 Rating Unit -0.3~7 V -0.3~34 V -0.3~35 V -0.3~7 V -0.3 150 C o 300 C o -65 to +150 C Min Max Unit 2.7 5 -40 125 July 2010 © Diodes Incorporated ...

Page 4

... SOT26 (Note 2) TSOT23-6 (Note 2) DFN2020C-6 (Note www.diodes.com AP5726 Min Typ. Max Unit 2 2.2 2 μA - 500 - μ 1.2 1.4 MHz 0.279 0.31 0.341 100 nA Ω - 0.95 1.2 - 750 - mA 1 0.4 V μ 162 o 152 C/W 200 C/W 30 July 2010 © Diodes Incorporated ...

Page 5

... AP5726 = 25mA) V vs. Quiescent Current IN 3 3.5 4 4.5 5 5 vs. Max Duty IN 3 3.5 4 4.5 5 5 vs. Feedback Voltage OUT (mA) OUT July 2010 © Diodes Incorporated ...

Page 6

... AP5726 Temperature vs. Shutdown Current 100 125 Temperature (℃) Tem perature vs. Frequency 100 Tem perature ( ℃ ) July 2010 © Diodes Incorporated 125 ...

Page 7

... I vs. Efficiency OUT 4. 3. LEDs ; L = 22uH OUT V vs. Efficiency IN 100 3 LEDs 4 LEDs LEDs 2.5 3 3.5 V (V) IN AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER (Continued LEDs ; L = 22uH 4 www.diodes.com AP5726 I vs. Efficiency OUT (mA) OUT July 2010 © Diodes Incorporated 30 ...

Page 8

... POWER 3.6V; 6 LEDs ; IOUT = 30mA IN AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER (Continued 3.6V; 6 LEDs ; IOUT = 30mA OUT POWER OFF V = 3.6V; 6 LEDs ; IOUT = 30mA OUT Irushi www.diodes.com AP5726 Ripple OUT SW V OUT OUT Irushin g July 2010 © Diodes Incorporated ...

Page 9

... Table 1. R Resistor Value Selection SET I (mA) R (Ω) LED SET 20.6 20 15.5 30 10.3 AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER in Figure 1). The feedback reference is 0.31V. The SET selection are shown below. SET www.diodes.com AP5726 July 2010 © Diodes Incorporated ...

Page 10

... A 0% duty cycle will turn off the AP5726 and corresponds to zero LED current. A 100% duty cycle corresponds to full current. The typical frequency range of the PWM signal is below 2kHz. AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER L1 D1 22uH OVP AP5726 GND www.diodes.com AP5726 C OUT 1uF SET July 2010 © Diodes Incorporated ...

Page 11

... WHITE LED STEP-UP CONVERTER decreases. Thus, the LED current decreases. The SET range from 0V to 2V, the selection of resistors in Figure 3 gives DC AP5726 100k SET 15 AP5726 FB R INC R SET www.diodes.com AP5726 sets how much the LED current SET July 2010 © Diodes Incorporated ...

Page 12

... Type SMD TMK212 B7105MG-T Type SOD323 SOD323 SOD523 Series FR-SK Series LTW-C1911UC5 www.diodes.com AP5726 VIN C2 1uF OFF Dimensions Series (mm) 3.8X 3.8 X 1.6 744031220 3.8 X 3.8 X 1.05 GLP3810PH220N 4.0 X 4.0 X 1.25 NR4012 Series Series ZLLS400 B0540WS SDM20U40 July 2010 © Diodes Incorporated ...

Page 13

... Notes: 3. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. Marking Information (1) SOT26 and TSOT23-6 Part Number AP5726WG-7 AP5726WUG-7 (2) DFN2020C-6 Part Number AP5726FDCG-7 AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER AP 5726 XXX ...

Page 14

... Package Outline Dimensions (1) Package Type: SOT26 (2) Package Type: TSOT23-6 AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER (All Dimensions in mm www.diodes.com AP5726 July 2010 © Diodes Incorporated ...

Page 15

... C 0.08 C Pin#1 ID 1.95/2.075 B 1.55/1.75 2x- 0.25 B 0.65nom. Bottom View AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER (Continued) (Active area depth) Seating plane C Top View 0.37 A 0.65 1.59 0.25/0.35 0. Land Pattern Recommendation (Unit:mm www.diodes.com AP5726 July 2010 © Diodes Incorporated ...

Page 16

... Taping Orientation For DFN2020C-6 Notes: 4. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf. AP5726 Document number: DS31845 Rev WHITE LED STEP-UP CONVERTER www.diodes.com AP5726 July 2010 © Diodes Incorporated ...

Page 17

... Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. ...

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