A Product Line of
Diodes Incorporated
APS39903
PUMP EXPRESS
TM
COMPATIBLE AC/DC PSR SWITCHER
Description
The APS39903 is a high accuracy and low cost switching mode
power supply switcher for battery charger/adapter applications. It is
consists of a primary side regulation controller and a high voltage
transistor. The controller regulates the output voltage and current in
the primary side by piece-wise Pulse Frequency Modulation (p-PFM)
in discontinuous conduction mode (DCM). The switcher uses adaptive
source current to optimize driving current to reduce driving loss. The
system operating frequency reduces linearly from heavy load to light
load in each interval of the p-PFM, and enters constant current mode
when the load current is equal to the maximum system output current.
The output voltage and output current limit of APS39903 can be
adjusted based on the patterns of load current aligned to MTK Pump
Express protocol.
The APS39903 provides operating frequency Jitter function from light
to full load range to improve the power supply EMI performance. The
APS39903 also has built-in fixed cable voltage drop compensation
(6% of nominal system output voltage) and adjustable line voltage
compensation.
The APS39903 can work individually to achieve Ultra-Low standby
power under 5V output.
The APS39903 is packaged in SO-7.
Pin Assignments
(Top View)
CPC
FB
VCC
CS
1
2
3
4
7
GND
NEW PRODUCT
6
5
C
C
SO-7
Features
Compatible to MediaTek Pump Express
TM
Protocol
Ultra-Low Standby Power Consumption
Built-in NPN Transistor with 700V
CBO
Valley-turn On to Reduce Switching Loss and Benefit for EMI
Piece-wise Frequency Reduction to Enhance Conversion Efficiency
and Suppress Audio Noise
±5%
Constant Voltage Accuracy for 5V Output
Audio Noise Suppression
Open Circuit Protection (OCkP)
Current Sense Resistor Short Protection
Over Voltage Protection (OVP)
Over Temperature Protection (OTP)
Short Circuit Protection (SCP) with Hiccup
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Adapters/Chargers
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
APS39903
Document number: DS37226 Rev. 2 - 2
1 of 17
www.diodes.com
October 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
APS39903
Typical Applications Circuit
FR1
L1
C7
R3
D4~D7
C1
+
C2
+
R4
D2
R11
R10
L2
C5
D3
TR1
D1
R12
+
C3
+
C4
R1
NEW PRODUCT
5V/1A
APS39903
3
VCC
C
1
5, 6
R13
CPC
GND
C6
7
FB
2
CS
4
R14
R2
Pin Descriptions
Pin Number
Pin Name
CPC
FB
VCC
CS
C
GND
Function
A capacitor is connected to this pin to form a low pass filter for cable voltage drop
compensation, audio noise suppression and detecting the patterns of load current to
change the output voltage and current
The CV and CC regulation are realized base on the voltage sampling of this pin
VCC supply pin for the switcher. A capacitor with low ESR should be placed as close
as possible to this pin
Current senses pin of IC. The CS pin will turn off the power transistor when the CS
pin voltage reaches turn off threshold.
This pin is connected with an internal power BJT’s collector
The ground of the switcher
1
2
3
4
5, 6
7
APS39903
Document number: DS37226 Rev. 2 - 2
2 of 17
www.diodes.com
October 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
APS39903
Functional Block Diagram
VCC
3
OVP
OCkP
SCP
OTP
R
CS
short
Regulator
&
Bias
Pro
UVLO
NEW PRODUCT
FB
2
7
t
ONS
Detection
t
ONS
GND
Constant Voltage Control
Cable Compensation
Line
Compensation
V
LOAD
5V~3.6V_select
Vally-
on and
Driver
Q1
5, 6
C
CS
CS
4
Constant Current
Control
Frequency Jitter
t
ONS
t
ONS
Load
Detection
1
V
LOAD
Output Voltage
Selection
5V~3.6V_select
5V~3.6V_select
CPC
Absolute Maximum Ratings
(Note 4)
Symbol
V
CC
V
CS
, V
CPC
V
FB
V
CBO
–
P
D
T
J
T
STG
T
LEAD
θ
JA
ESD
ESD (Machine Model)
Note 4:
Parameter
Supply Voltage
Voltage on CS, CPC Pin
FB Input Voltage
Collector-emitter Voltage
Collector DC Current
Total Power Dissipation
Operating Junction Temperature
Storage Temperature
Lead Temperature (Soldering, 10 sec)
Thermal Resistance (Junction to Ambient)
ESD (Human Body Model)
Rating
-0.3 to 35
-0.3 to 7
-0.3 to 8
700
1.5
0.7
-40 to +150
-65 to +150
+300
100
4000
300
Unit
V
V
V
V
A
W
°
C
°
C
°
C
°
C/W
V
V
Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
APS39903
Document number: DS37226 Rev. 2 - 2
3 of 17
www.diodes.com
October 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
APS39903
Electrical Characteristics
Symbol
(@V
CC
= 12V, T
A
= +25° unless otherwise specified.)
C,
Parameters
Conditions
Min
Typ
Max
Unit
STARTUP AND UVLO SECTION
V
TH_ST
V
OPR(MIN)
Startup Threshold
Minimal Operating Voltage
–
–
13
5.2
15.5
5.8
18
6.4
V
V
STANDBY CURRENT SECTION
NEW PRODUCT
I
ST
I
CC_QST
Startup Current
Quiescent Current
V
CC
= V
TH_ST
-1V before
startup
Static current
0
435
0.2
500
0.6
μA
565
DRIVING OUTPUT SECTION
I
OUT(MAX)
The Maximum Source Current
–
25
32
39
mA
POWER TRANSISTOR SECTION
V
CE(SAT)
h
FE
I
CEO
Collector-emitter Saturation Voltage
DC Current Gain
Leakage Current
I
C
=0.5A
–
–
–
14
–
–
17
–
0.3
–
60
V
–
nA
OPERATING FREQUENCY SECTION (5% Load to Full Load)
t
OFF(MAX)
Maximum Off Time
–
37% to 100% full load
t
SAMPLE
Sampling Time
4% to 37% full load
0% to 4% full load
(Note 5)
FREQUENCY JITTER
△V
CS
/V
CS
t
MOD
V
CS
Modulation
V
CS
Modulation Period
7% to 100% full load
–
2
230
3
256
4
282
%
μs
691
5.4
3.2
2.25
768
6
3.6
2.5
845
6.6
4.0
2.75
μs
μs
μs
μs
CURRENT SENSE SECTION
V
CS_H
(Vo≥4.4V)
V
CS_H
(Vo<4.4V)
V
CS_M
V
CS_L
R
LINE
t
LEB
Built-in Line Compensation Resistor
Leading Edge Blanking
V
CS_L
(Note 5)
CONSTANT VOLTAGE SECTION
V
FB
@5V
Feedback Threshold Voltage
–
3.94
4.0
4.06
V
170
200
230
830
37% to 100% full load
940
Current Sense Threshold
4% to 37% full load
0% to 4% full load
(Note 5)
–
V
CS_H
and V
CS_M
550
320
260
425
600
350
330
500
650
380
400
575
ns
Ω
1020
1100
mV
900
970
APS39903
Document number: DS37226 Rev. 2 - 2
4 of 17
www.diodes.com
October 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
APS39903
Electrical Characteristics
Symbol
V
FB
@4.8V
V
FB
@4.6V
V
FB
@4.4V
V
FB
@4.2V
Feedback Threshold Voltage
–
(@V
CC
= 12V, T
A
= +25° unless otherwise specified.) (Cont.)
C,
Parameters
Conditions
Min
3.75
3.61
3.47
3.32
3.18
3.03
2.89
Typ
3.85
3.7
3.56
3.41
3.26
3.11
2.96
700
6
Max
3.95
3.79
3.65
3.5
3.34
3.19
3.03
840
7
Unit
V
NEW PRODUCT
V
FB
@4V
V
FB
@3.8V
V
FB
@3.6V
R
FB
V
CABLE
/V
OUT
%
FB Pin Input Resistance
Cable Compensation Ratio@5V
V
FB
=4V
–
560
5
kΩ
%
CONSTANT CURRENT SECTION
t
ONS
/t
SW
@5V
&4.2V
t
ONS
/t
SW
@
4.8V&4V
t
ONS
/t
SW
@
4.6V&3.8V
t
ONS
/t
SW
@
4.4V&3.6V
0.47
0.49
Maximum Secondary Duty Cycle
V
FB
=2V (Note 5)
0.51
0.53
0.54
0.56
0.57
0.59
0.5
0.52
0.53
0.55
–
DYNAMIC SECTION
V
UV_H
Under Voltage of Feedback Pin for V
CS_H
(Note 5)
3.61
3.68
3.75
V
OUTPUT VOLTAGE SELECTION SECTION
V
CPC_L
Current Control Threshold
V
CPC_H
t
ON_A
t
ON_B
Current Control Pattern Time
t
ON_C
t
OFF_D
t
WDT
Watch Dog Time
–
(Note 5)
50
50
180
100
100
210
150
150
240
ms
V
CPC
control_H
V
CPC
control_L
–
–
400
220
88
150
500
300
–
–
600
380
ms
mV
PROTECTION FUNCTION SECTION
V
FB(OVP)
V
CC(OVP)
V
FB(SCP)
t
SCP
T
OTP
T
HYS
Over Voltage Protection
Over Voltage Protection at VCC Pin
Short Circuit Protection
Maximum Time under V
FB(SCP)
Shutdown Temperature
Temperature Hysteresis
–
–
V
FB
@ Hiccup
–
–
–
7.1
27
1.61
116
+128
+36
7.5
30
1.7
128
+140
+40
7.9
33
1.79
140
+152
+44
V
V
V
ms
°
C
°
C
Note 5: Guaranteed by design.
APS39903
Document number: DS37226 Rev. 2 - 2
5 of 17
www.diodes.com
October 2014
© Diodes Incorporated
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