AP3064EV1 User Guide

AP3064EV1 User Guide
General Description
Key Features
This demonstration board utilizes the
AP3064 high efficiency boost controller with
4-string current sources for driving WLED
backlight. The AP3064 operates over a wide
input voltage range from 4.5V to 33V.




The current of 4 strings are simply
programmed from 20mA to 220mA with an
external resistor. The current matching
between each string is 1.5% (Typ). Its
operating frequency can be adjusted from
0.1MHz to 1MHz, which allows trade-offs
between external component size and
system efficiency. The AP3064 supports
external Pulse Width Modulation (PWM)
Dimming Control with a wide dimming
frequency range from 100Hz to 20kHz.
The AP3064 features cycle-by-cycle current
limit, soft-start, under voltage lockout
(UVLO) protection, programmable OVP,
over temperature protection (OTP),
open/short
LED
protection,
VOUT
short/Schottky diode open protection and
Schottky Diode / Inductor short-circuit
protection.
Applications



LCD Monitor
LCD Display Module
LCD TV
AP3064EV1
May 2014
www.diodes.com


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Input Voltage Range: 4.5V to 33V
Drives up to 4 Strings in Parallel, Up to
220mA per string
Programmable WLED Current from
20mA to220mA
Adjustable Operating Frequency:
100kHz to1MHz
String-to-string Current Matching
Accuracy: 1.5%
Built-in OCP, OTP, UVLO
External PWM Dimming
Open/Short LED Protection
Programmable Soft-start
Programmable OVP
Schottky Diode/Inductor Short-circuit
Protection
VOUT Short/Schottky Diode Open
Protection
AP3064EV1 Specifications
Parameter
Value
Input Voltage
LED Current
Number of LEDs
24VDC
120mA * 4Channel
13 LEDs in series per
string, 4 strings
103mm x 56mm
XY Dimension
Page 1 of 8
AP3064EV1 User Guide
Figure 1: Top View
Figure 2: Bottom View
Connection Instructions
Power Supply Input: 24VDC (VIN, GND)
Enable Signal Input: 5V DC (EN, GND)
PWM Signal Input: (DIM, GND)
LED Outputs: LED+ (Vo), LED- (VCH1~VCH4)
AP3064EV1
May 2014
www.diodes.com
Page 2 of 8
AP3064EV1 User Guide
Evaluation Board Schematic
[email protected]
VIN
L
C1
22mF
VIN
OUT
R4 0W
C5
47mH
D1
Q1
R10
C3
C4
22mF
22mF
R13 2W
CS
NC
FB
VOUT
1M
R3 0W
NC
R1
0.3W
C2
R2
0.3W
C8
820pF
R11
30k
13X4
EN
ON OFF
R6 10k
R5
300k
OVP
R15
1k
C7
0.22mF
R14
VCC
CH1
---
COMP
AP3064
RT
R12
120k
CH4
C6
100k 2.2mF
STATUS
STATUS
ISET
R9
R7
ON OFF
R8
10k
300k
DIM
GND
10k
Figure 3: Evaluation Board Schematic
AP3064EV1
May 2014
www.diodes.com
Page 3 of 8
AP3064EV1 User Guide
Evaluation Board Layout
Figure 4: PCB Board Layout Top View
Figure 5: PCB Board Layout Bottom View
Quick Start Guide
1.
2.
3.
4.
5.
6.
7.
By default, the evaluation board is preset at 120mA LED Current per channel by R9.
Connect the anode wire of external LED string to Vo pin.
Connect the cathode wire of external LED string to CH1~CH4 pins.
Power Supply: Connect the 24VDC to Vin & GND pin to supply AP3064
Enable the IC: Connect 5 VDC to EN & GND pin to enable the circuit.
PWM Dimming: Connect a synchronal PWM signal (Vpp=5V) to PWM pin to dim the LEDs.
LED string should light up after 4~6 steps.
AP3064EV1
May 2014
www.diodes.com
Page 4 of 8
AP3064EV1 User Guide
Bill of Material
#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Name
Quantity
Package
Description
U1
1
SOP-16
AP3064
L1
1
DIP-2
47uH/3A
Q1
1
TO-252(DPAK)
100V/7.7A; ZXMN10A09K
D1
1
SMC
100V/3A; B3100
C1
1
Φ6
22uF/50V
C3,C4
2
Φ6
22uF/100V
R1,R2
2
1206
300mΩ, 5% Precision
R3,R4
2
0805
0Ω, 5% Precision
R5
1
0805
300kΩ, 5% Precision
R6,R7
2
0805
10kΩ, 5% Precision
R9
1
0805
10kΩ, 1% Precision
R10
1
0805
1MΩ, 5% Precision
R11
1
0805
30kΩ , 5% Precision
R12
1
0805
120kΩ, 5% Precision
R13
1
0805
2Ω, 5% Precision
R14
1
0805
100kΩ, 5% Precision
R15
1
0805
1kΩ, 5% Precision
C6
1
0805
2.2uF/16V, Ceramic X7R
C7
1
0805
0.22uF/16V, Ceramic X7R
C8
1
0805
21
FB
1
1206
820pF/16V, Ceramic X7R
[email protected] Hz,
AEM:MCP1206F300PT-T
AP3064EV1
May 2014
www.diodes.com
Page 5 of 8
AP3064EV1 User Guide
Functional Waveforms
Waveforms:
VSW
VIN
VO
VSW
ICH
Operation Waveform (100% Duty)
VPWM
ICH
VO
Dimming Waveform (fPWM=200Hz ,50% Duty)
Functional Data Curves
100
130
90
120
110
80
100
Channel Current (mA)
Efficiency (%)
70
60
50
AP3064
Vin=24V
40
30
20
90
80
70
60
50
40
30
fDimming=200Hz
20
10
10
0
50
100
150
200
250
300
350
400
450
500
550
0
0
10
20
30
40
50
60
70
80
90
Output Current(mA)
Duty Cycle (%)
Efficiency VS Output current
Channel Current VS Duty cycle
AP3064EV1
May 2014
www.diodes.com
Page 6 of 8
100
AP3064EV1 User Guide
Thermal Test
Thermal Test of AP3064
AP3064EV1
May 2014
www.diodes.com
Page 7 of 8
AP3064EV1 User Guide
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS
DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other
changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any
liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated
convey any license under its patent or trademark rights, nor the rights of others. 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.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized
sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall
indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized
application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names
and markings noted herein may also be covered by one or more United States, international or foreign trademarks.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems
without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided
in the labeling can be reasonably expected to result in significant injury to the user.
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A critical component is any component in a life support device or system whose failure to perform can be reasonably expected
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Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2013, Diodes Incorporated
www.diodes.com
AP3064EV1
May 2014
www.diodes.com
Page 8 of 8
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