AME AME5136AEVBADJZ-3

AME, Inc.
AME5136
n General Description
The AME5136 is a dual Boost DC/DC converter, designed to drive up to 4 white LEDs with a constant current and to power an organic LED display with a constant
voltage. According to SEL pin status, the AME5136 can
either regulates output current flowing through series connected LEDs or regulate output voltage applying to OLED.
Integrated White LED Driver With
Organic LED Display Power Supply
n Typical Application
V IN
2.7V~4.2V
L 10µH
CIN
4.7µF
Main Display
COUT1
1µF
SW
VIN
OVP
A single external resistor is used to set the maximum
LED current. The LED current can be adjusted by applying a PWM signal to the EN pin. Pulling the EN pin to
GND disables the chip and reduces the supply current to
less than 1uA. Additional features include a low-side NFET
switch that can turn off the LED string with no DC current
path to ground. Other features include OVP, OCP, UVP
ILED1
CH1
VFB1
ILED1=
FB1
>1.5V
0.21
R FB1
RFB1
AME5136
0V
EN
CH2
47P
RSUB1
Main
V SUB
and OTP.
OLED
SUB
Display
FB2
SEL
RSUB2
GND
The AME5136 is available in a small DFN-10(
3mmx3mmx0.85mm) package.
 R

VSUB = 1 + SUB1  ×1.23
 RSUB 2 
n Features
l Integrated OLED and White-LED Driver
l Wide Input Voltage Range: 2.7V to 5.5V
D
Figure 1. Main LEDs Display and OLED SUB Display
l Adjustable output voltage up to 20V
l Complete Protection: OVP, OTP, UVP
l PWM Dimming Control
l Small External Components
VIN
2.7V~4.2V
L 10µH
C IN
4.7µF
D
Main Display
COUT1
1µF
SW
VIN
l Cycle-By-Cycle Current Limit
l All AME's Lead Free Products Meet RoHS
OVP
Standards
ILED1
CH1
FB1
n Applications
l
White LED Back-Lighting
l
Hand-held Devices
l
Digital Cameras
l
Flip-phones / Clam-shell Cellular Phones
l
High-fashion cellular phones
>1.5V
0V
ILED1=
0.21
RFB1
R FB1
AME5136
EN
VFB1
VSUB
CH2
C OUT2
1µF
Main
VSUB
ILED2
SEL
FB2
GND
VFB2
RFB2
ILED2=
1.23
RFB2
Figure 2. 4 LEDs for Main Panel and 3 LEDs for SUB
Panel
1
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
n Function Block Diagram
L
D
Main Display
V IN
1
SW 10
VIN
OVP 9
C1
OVP
COMP
XEnable
Vref
Enable
UVP
COMP
UVP
REF
2
OTP
OVP
REF
CL
COMP
CL
400ns
Adjust
one shut
5
Current
sensing
N2
CH1
EN
FB1
CIN
Logic
4
Driver
RFB1
N1
3
P1
Select Logic
Driver
ref1
SEL
CH2
8
ref2
CP
FB2
7
6
GND
Figure 3. AME5136 Function Block Diagram
2
Organic
LED
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
n Pin Configuration
DFN-10
(3mmx3mmx0.85mm)
Top View
AME5136AEVB
10
9
8
7
6
1. VIN
2. EN
3. SEL
4. FB1
AME5136
5. CH1
6. GND
1
2
3
4
5
7. FB2
8. CH2
9. OVP
10. SW
* Die Attach:
Conductive Epoxy
Note : The area enclosed by dashed line represents Exposed Pad and connect to GND.
n Pin Description
Pin Number
Pin Name
Pin Description
1
VIN
Input Voltage.
2
EN
Shutdown control input, active low.
The shutdown pin is an active low control. Tie this pin above 1.5V to enable
the device. Tie this pin below 0.4V to turn off the device.
3
SEL
Selection Pin. Internal MOSFET selection. Pull low to turn on the internal
CH1. Pull high to turn on CH2.
4
FB1
Main Display Feedback.
5
CH1
Main Display Return Voltage
6
GND
Ground.
7
FB2
SUB Display Feedback.
8
CH2
SUB Display Power Supply Voltage.
9
OVP
Over Voltage Protection.
10
SW
This is the switch pin and is connected to the drain of the internal NMOS
power switch N1.


R
VSUB =  1 + SUB1  × 1.23
 R SUB2 
3
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
n Ordering Information
AME5136 x x x x xxx x- x
Special Feature2
Special Feature1
Output Voltage
Number of Pins
Package Type
Operating Ambient Temperature Range
Pin Configuration
Pin
Configuration
A
(DFN-10)
1. VIN
2. EN
3. SEL
4. FB1
5. CH1
6. GND
7. FB2
8. CH2
9. OVP
10. SW
Operating Ambient
Number
Package
Temperature
of
Output Voltage
Type
Range
Pins
E: -40OC to +85OC V: DFN
B: 10
Special
Feature1
ADJ: Adjustable Z: Lead free
Special Feature2
(For DFN package only)
3: 3x3x0.85(mm) (LxWxH)
n Ordering Information
Part Number
Marking*
Output
Voltage
Package
Operating Ambient
Temperature Range
AME5136AEVBADJZ-3
BDZ
yyww
ADJ
DFN-10
(3mmx3mmx0.85mm)
-40oC to +85oC
Note: ww represents the date code and pls refer to Date Code Rule page on Package Dimension.
* A line on top of the first letter represents lead free plating such as BDZ.
Please consult AME sales office or authorized Rep./Distributor for the availability of package type.
4
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
n Absolute Maximum Ratings
Parameter
Symbol
Maximum
VIN
6
VEN ,V FB
VIN
VSW
30
Input Supply Voltage
EN, FB Voltages
SW Voltage
Unit
V
A*
ESD Classification
Caution: Stress above the listed absolute rating may cause permanent damage to the device.
* HBM A: 0V ~ 1999V
n Recommended Operating Conditions
Parameter
Symbol
Rating
Unit
Input Supply Voltage
VIN
2.7 to 5.5
V
Ambient Temperature Range
TA
-40 to +85
o
C
Junction Temperature Range
TJ
-40 to +125
n Thermal Information
Parameter
Thermal Resistance
(Junction to Ambient)
Package
Die Attach
Symbol
Maximum
θJA
48
PD
2
Unit
o
C/W
DFN-10
Conductive Epoxy
(3x3x0.85)(mm)
Internal Power Dissipation
W
Maximum Junction Temperature
150
o
C
Solder Iron (10 Sec)**
350
o
C
* MIL-STD-202G 210F
5
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
n Electrical Specifications
VIN=3.6V, EN = VIN, TA= 25oC unless otherwise noted.
Parameter
Input Voltage Range
Symbol
V IN
Test Condition
o
TA = -40 C to +85 C
FB = 0.3
(Not Switch)
Main Display Quiescent Current
IQ(Main)
Shutdown Current
FB1 Feedback Voltage
FB2 Feedback Voltage
Switch Current Limit
ISD
V FB1
V FB2
ICL
TA = 25 C
150
o
TA = -40 to 85 C
150
TA = -40 to 85oC
FB = 1.15V
(Switching)
TA = 25oC
150
o
TA = -40 to 85 C
RDSON
150
TA = -40 to 85oC
EN = 0V
200
200
250
2
0.2
0.21
0.23
TA = -40 to 85 C
1.2
1.23
1.26
TA = 25oC
300
350
400
o
TA = -40 to 85 C
o
TA = -40 to 85 C
TA = -40 to 85 C
t OFF
400
0.6
1.6
8
10
6
8
400
TA = -40 to 85 C
1.7
2
2.3
Output Over Voltage Protection
OVP
TA = -40 to 85oC
21
22
23
Over Temperature Protection
OTP
160
Over Temperature Hysteresis
OTH
20
V
V SW = 5V
NMOS Switch Leakage N2
EN Input Threshold (Low)
(Shutdown)
EN Input Threshold (High)
(Enable the device)
Sel Low Level Voltage
Enable SUB Display
Disable Main Display
Sel High Level Voltage
Enable Main Display
Disable SUB Display
EN
Threshold
Ω
ns
UVP
ISW
µA
mA
280
Input Under Voltage Lockout
PMOS Switch Leakage P1
µA
V
o
o
µA
250
0.05
o
Main Switch Leakage N1
6
V
400
NMOS Switch RDSON , N2
Switch off time
5.5
300
Main_Switch RDSON, N1
PMOS Switch RDSON , P1
Units
400
o
TA = 25 C
Max
300
TA = 25 C
FB = 1.3V
(Not Switch)
IQ(SUB)
Typ
2.7
o
o
FB = 0.1
(Switching)
SUB Display Quiescent Current
Min
o
o
0.1
2
0.5
1
0.5
1
C
µA
0.4
o
TA = -40 to 85 C
V
1.5
0.3
SEL
Threshold
o
TA = -40 to 85 C
V
1.5
AME, Inc.
AME5136
n Detailed Description
The AME5136 is designed for white LED & OLED backlighting in mobile phone applications. It has a main display loop which can drive up to 4 white LEDS in series
and a SUB display loop which is designed to drive OLED
up to 20V/10mA or 3 white LEDs.
The AME5136 operates at a wide input voltage range
suitable for Li-ion battery and has a constant off time for
smaller inductor and capacitors. The block diagram refers the operation circuit. By SEL pin, it can choose the
different channel to turn on CH1 or CH2.
Current Limit Protection
The AME5136 has current limiting protection to prevent excessive stress on itself and external components
during overload conditions. The internal current limit comparator will disable the NMOS power device at a typical
switch peak current limit of 300mA.
Output Over-Voltage Protection
The AME5136 contains dedicated circuitry for monitoring the output voltage. In the event that the primary LED
network is disconnected the output will increase and be
limited to 22V(typ.). There is a ~1V hysteresis associated with this circuitry, which will turn the NMOS off when
the output voltage is at 23V(max.) until the output voltage reach 21V(typ.) or lower. The 22V limit allows the
use of 25V 1µF ceramic output capacitors creating an
overall small solution for white LED applications.
Integrated White LED Driver With
Organic LED Display Power Supply
n Application Information
Inductor Selection
The recommended value of inductor for AME5136 applications is 10uH. Small size and better efficiency are
the major concerns for portable device, such as AME5136
used for dual panel mobile phone. The inductor should
have low DCR for better efficiency. To avoid inductor saturation, current rating should be at least 600mA. The in
put range is 2.7V to 5.5V.
Capacitor Selection
4.7µF input capacitor can reduce input ripple. For better voltage stability, to increase the input capacitor value
or using LC filter is feasible, especially in the Li-ion battery application. 1uF output capacitor is sufficient to reduce output voltage ripple. For better voltage filtering,
ceramic capacitors with low ESR are recommended. X5R
and X7R types are suitable because of their wider voltage
and temperature ranges.
Diode Selection
Schottky diode is a good choice for AME5136 because
of its lower forward voltage drop and faster reverse recovery. Using schottky diode can get better efficiency. The
high speed rectification is also a good characteristic of
schottky diode for high switching frequency. Current rating of the diode must meet the root mean square of the
peak current and output average current multiplication.
Under Voltage Protection
The AME5136 has an UVP comparator to turn the NMOS
power device off in case the input voltage or battery voltage is too low preventing an on state of the power device
conducting large amounts of current.
7
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
EN Threshold vs. VIN
Feedback Voltage vs. VIN (4LEDs)
1.5
0.25
1.4
0.23
10mA
1.3
EN Threshold (V)
1mA
VFB (V)
0.21
20mA
0.19
0.17
0.15
1.2
TA=-40o C
1.1
1.0
0.9
TA=85 oC
0.8
0.7
T A=25oC
0.6
0.13
0.5
0.11
2.7
3
3.3
3.6
3.9
4.2
4.5
4.8
5.1
0.4
2.5
5.5
3
3.5
4
4.5
5
5.5
VIN (V)
VIN (V)
Feedback Voltage vs. VIN (3LEDs)
Feedback Voltage vs. VIN (3LEDs)
0.27
0.27
COUT= 4.7µF
COUT = 1µF
0.25
0.25
VFB ( V )
VFB ( V )
10mA
0.23
1mA
20mA
0.21
30mA
0.23
0.21
0.19
0.19
0.17
2.7
0.17
2.7
1mA
20mA
10mA
30mA
3
3.3
3.6
3.9
4.2
4.5
4.8
5.1
5.5
3
3.3
3.6
3.9
4.2
4.5
4.8
5.1
5.5
VIN ( V )
VIN ( V )
Main Display Efficiency ( 4LEDs )
Main Display Efficiency ( 4LEDs )
90
90
Inductor=10µH
Inductor=22µH
VIN=4.2V
85
85
80
VIN=3.6V
75
VIN =3V
70
80
VIN=3V
75
VIN=4.2V
70
65
65
60
1
4
7
10
13
Load Current ( mA )
8
Efficiency (%)
VIN=3.6V
16
19
60
1
4
7
10
13
Load Current ( mA )
16
19
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
Main Display Efficiency ( 3LEDs )
Main Display Efficiency ( 3LEDs )
90
85
Inductor=22µH
Inductor=10µH
VIN =3V
80
VIN=3.6V
75
VIN=4.2V
70
80
Efficiency (%)
Efficiency (%)
85
VIN=3V
75
VIN=4.2V
70
VIN=3.6V
65
65
60
60
1
4
7
10
13
16
19
1
7
4
Sub Display Efficiency( VSUB=12V)
16
19
90
VIN=3.6V
VIN =4.2V
80
85
75
Efficiency (%)
VIN=3.3V
VIN=2.5V
70
65
60
VIN=5.0V
VIN=3.6V
80
VIN=3.3V
VIN=2.5V
75
VIN=4.2V
70
65
55
Inductor=10µH
Inductor=22µH
50
1
4
7
10
13
16
60
19
1
4
7
Load Current (mA )
10
13
16
19
Load Current (mA )
Sub Display Efficiency( VSUB=20V)
Sub Display Efficiency( VSUB=20V )
85
90
VIN=4.2V
VIN=4.2V
85
VIN=5.0V
80
80
75
VIN=2.5V
70
V IN=3.3V
VIN=3.6V
VIN=3.3V
Efficiency (%)
Efficiency (%)
13
Sub Display Efficiency (V SUB=12V)
85
Efficiency (%)
10
Load Current ( mA )
Load Current (mA)
65
75
V IN=3.6V
70
V IN=2.5V
65
60
60
55
50
Inductor=22µH
55
Inductor=10µH
50
1
4
7
10
13
Load Current (mA)
16
19
1
4
7
10
13
16
19
Load Current (mA )
9
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
Sub Enable Current vs. VIN
(Part not Switching)
Main Enable Current vs. VIN
(Part Switching)
300
300
TA=85 oC
TA=85 oC
Enable Current (µA)
Enable Current (µA)
250
200
T A=-40oC
150
100
TA=25 oC
250
200
TA=-40 oC
150
100
0
2.5
TA=25 oC
50
50
3
3.5
4
4.5
5
0
2.5
5.5
3
3.5
VIN (V)
4
4.5
5
Sub Disable Current vs. VIN
(Part not Switching)
Main Disable Current vs. VIN
(Part Switching)
300
300
TA=85 oC
250
Disable Current (µA )
Disable Current (µA)
T A=85oC
200
o
TA=-40 C
150
100
o
T A=25 C
50
0
2.5
250
200
TA=-40 oC
150
100
T A=25oC
50
3
3.5
4
4.5
5
0
2.5
5.5
3
3.5
4
Switch RDSON vs. VIN
5
2.3
Main Display 4LEDs
ILED=20mA
VOUT=12V
Turn On / Turn Off (V)
1.5
1.4
1.3
1.2
1.1
1.0
TA=85 oC
0.8
TA=-40o C
TA=25 oC
0.7
2.2
2.1
2.0
1.9
TON
1.8
0.6
0.5
2.5
TOFF
3
3.5
4
VIN (V)
10
5.5
Input Under Voltage Lockout vs. Temp.
1.6
RDSON (Ω)
4.5
VIN (V)
VIN ( V )
0.9
5.5
VIN (V)
4.5
5
5.5
1.7
-40
-20
0
20
40
60
Temperature (oC)
80
100
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
Typical Switching Waveform
1
Typical Switching Waveform
1
2
2
3
3
V OUT =12V, V IN=3.6V; 4LEDs
IOUT =20mA (RFB1=10Ω)
1) V SW= 10V/div,DC
2) V OUT , 100mV / div,AC
3) Inductor Current, 200mA / div,DC
T= 10µS / div
Inductor=10µH, COUT =4.7µF
V OUT =12V, V IN=2.5V; 4LEDs
IOUT =10mA (RFB1=20 Ω)
1) V SW= 20V/div,DC
2) V OUT , 100mV / div,AC
3) Inductor Current, 200mA / div,DC
T= 10µS / div
Inductor=10µH, COUT =4.7µF
Step Response
Start-Up/Shutdown
1
1
2
2
3
3
V OUT = 12V , V IN=3.6V
1) Load 2mA to 15mA to 2mA ,DC.
2) V OUT , 100mA / div,AC
3) Inductor Current 200mA / div,DC
T= 20µS /div
V OUT =12V , V IN=2.7V
1) EN , 1V/ div.DC
2) V OUT , 10/div,DC
3) Inductor Current 100mA/div,DC
Load = 4LEDs, T=2ms/div
11
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
FB Trip Point vs Temperature
SUB Display
Output Over Voltage Protection vs. Temp.
23.0
1.259
1.249
1.239
1.229
V IN =4.2V
1.219
1.209
1.199
-40
V IN =3.6V
-20
22.6
22.4
22.2
22.0
21.8
21.6
21.4
VIN=3.6V
21.2
0
20
40
o
Temperature ( C)
12
Output Over Voltage (V)
Feedback Trip Point (V)
22.8
60
80 85
21.0
-40
-20
0
20
40
Temperature ( oC)
60
80
85
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
n Date Code Rule
Marking
Date Code
Year
A
A
A
W
W
xxx0
A
A
A
W
W
xxx1
A
A
A
W
W
xxx2
A
A
A
W
W
xxx3
A
A
A
W
W
xxx4
A
A
A
W
W
xxx5
A
A
A
W
W
xxx6
A
A
A
W
W
xxx7
A
A
A
W
W
xxx8
A
A
A
W
W
xxx9
n Tape and Reel Dimension
DFN-10
(3mmx3mmx0.85mm)
P
W
AME
AME
PIN 1
Carrier Tape, Number of Components Per Reel and Reel Size
Package
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
DFN-10
(3mmx3mmx0.85mm)
8.0±0.1 mm
4.0±0.1 mm
1000pcs
180±1 mm
13
AME, Inc.
Integrated White LED Driver With
Organic LED Display Power Supply
AME5136
n Package Dimension
DFN-10
(3mmx3mmx0.85mm)
D
SYMBOLS
MILLIMETERS
MIN
A
E
D2
L
b
PIN 1 ID
E2
e
BOTTOM VIEW
A
G
F
SIDE VIEW
14
0.900
MAX
0.035
2.900
3.100
0.114
0.122
E
2.900
3.100
0.114
0.122
e
H
MIN
D
F
TOP VIEW
MAX
INCHES
0.450 TYP.
0.450
0.550
0.017 TYP.
0.018
0.022
D2
1.600 TYP.
0.063 TYP.
E2
2.400 TYP.
0.094 TYP.
b
0.150
0.250
0.0059
0.010
L
0.350
0.450
0.014
0.018
G
0.010
0.090
0.0004
0.004
H
0.000
0.050
0.000
0.002
www.ame.com.tw
E-Mail: sales@ame.com.tw
Life Support Policy:
These products of AME, Inc. are not authorized for use as critical components in life-support
devices or systems, without the express written approval of the president
of AME, Inc.
AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and
advises its customers to obtain the latest version of relevant information.
 AME, Inc. , Julu 2006
Document: 1011-DS5136-A.01
Corporate Headquarter
U.S.A. (Subsidiary)
AME, Inc.
Analog Microelectronics, Inc.
2F, 302 Rui-Guang Road, Nei-Hu District
Taipei 114, Taiwan.
Tel: 886 2 2627-8687
Fax: 886 2 2659-2989
3100 De La Cruz Blvd., Suite 201
Santa Clara, CA. 95054-2046
Tel : (408) 988-2388
Fax: (408) 988-2489