BCD AP3700AZTR-G1 Low power pwm controller for off-line battery charger Datasheet

Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
General Description
Features
The AP3700/A is a green-mode pulse width modulation (PWM) controller. It is specially designed for low
power applications such as off-line battery chargers,
where the needs for low standby power, space saving
and low cost are all required. In a battery charger rated
5V/1A, the maximum standby power is only 0.18W.
·
·
·
·
·
·
·
·
·
In normal operation, the AP3700/A switches on and
off at a fixed switching frequency of 60 kHz. With a
current limit capability of 460mA for AP3700 and
500mA for AP3700A, the AP3700/A can directly
drive the emitter of high voltage NPN transistor. When
output power falls below a given level, the IC enters
skip cycle mode to reduce power consumption.
AP3700/A
Current Mode Control with Skip Cycle Capability
Lower Operating Current: 0.45mA
Fixed Switching Frequency: 60 kHz
Frequency Dithering for Low EMI: ±2.5kHz
Under-Voltage Lockout Protection
Over-Current Protection
Internal Short Circuit Protection
Higher Output Voltage at OUT Terminal
Low Total Cost Solution
Applications
·
·
The AP3700/A also features under-voltage lockout,
over-current and short circuit protections.
Battery Chargers
Off-Line Power Supplies
The AP3700/A is available in TO-92 package.
TO-92
(Bulk Packing)
TO-92
(Ammo Packing)
Figure 1. Package Types of AP3700/A
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
1
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Pin Configuration
Z Package
(TO-92)
3
OUT
2
GND
1
VCC
Figure 2. Pin Configuration of AP3700/A (Top View)
Pin Description
Pin Number
Pin Name
Function
1
VCC
2
GND
Supply ground
3
OUT
The output pin, connected to the emitter of NPN transistor or the source of MOSFET
The power supply of the IC, and is generally connected to opto-coupler's emitter
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
2
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Functional Block Diagram
VCC
1
3
REGULATOR
UVLO
COMPARATOR
VREF
1.24V
SHORT CIRCUIT
COMPARATOR
_
+
+
SLOPE RAMP
CLAMP
COMPARATOR
+
+
+
_
BANDGAP
&
BIAS
GND
_
VREF
OUT
VREF
1.24V
OSCILLATOR
PWM
COMPARATOR
DRIVER
PWM
CONTROL
_
2
Figure 3. Functional Block Diagram of AP3700/A
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
3
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Ordering Information
AP3700
E1: Lead Free
G1: Green
Circuit Type
TR: Ammo
Blank: Bulk
Blank: AP3700
A: AP3700A
Package
Switching
Frequency
Temperature
Range
Package
Z: TO-92
Part Number
Lead Free
Green
AP3700Z-E1
TO-92
60kHz
-40 to 85oC
Marking ID
Lead Free
AP3700Z-G1
3700Z-E1
Packing
Type
Green
3700Z-G1
Bulk
Ammo
AP3700ZTR-E1
AP3700ZTR-G1
3700Z-E1
3700Z-G1
AP3700AZ-E1
AP3700AZ-G1
3700AZ-E1
3700AZ-G1
Bulk
AP3700AZTR-E1
AP3700AZTR-G1
3700AZ-E1
3700AZ-G1
Ammo
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.
Absolute Maximum Ratings (Note 1)
Parameter
Value
Unit
Supply Voltage
-0.3 to 6.0
V
Voltage at OUT (Note 2)
-0.3 to 40
V
Output Current at OUT
Internally limited
A
Power Dissipation
0.6
W
Operating Junction Temperature
150
oC
-65 to 150
oC
Lead Temperature (Soldering, 10s)
300
oC
ESD (Machine Model)
200
V
Storage Temperature
Note 1: 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.
Note 2: The Breadown Voltage. The actual operating voltage can not be greater than the value listed here.
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
4
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Electrical Characteristics
(VCC=4V, TJ=25oC, unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
VTH (ST)
5.00
5.25
5.50
V
VOPR(min)
3.4
3.65
3.9
V
0.22
0.4
0.45
0.7
UVLO SECTION
Start-up Voltage
Minimal Operating Voltage
STANDBY CURRENT SECTION
Start-up Current (Note 3)
IST
Operating Current
ICC(OPR)
VCC Zener Voltage
VZ
Dynamic Impedance
RVCC
VCC=4V
ICC=10mA
6
VCC=3.8 to 4.8V
mA
6.3
V
18
kΩ
INTERNAL OSCILLATOR
Switching Frequency
FSW
Frequency Dither
50
60
75
kHz
±2
±2.5
±3
kHz
5
8
%
11
V
Temperature Stability
DRIVE OUTPUT SECTION
OUT Start-up Voltage
VST
8.5
Short Circuit Threashold
Voltage (Note 4)
VSC
6
Rise Time
TR
CL=1nF, 15Ω pull-up
60
Fall Time
TF
CL=1nF, 15Ω pull-up
30
Maximum Duty Cycle
DMAX
Minimum Duty Cycle
Driver OUT On-Resistance
ROUT
Switch Off Current (OUT)
Effective Current Limit
OUT Current Coefficient
ILIM
VOPR(min) + 0.2V
67
75
VCC=VTH (ST)-0.2V
3
IOUT=0.06A
3
Driver off, VOUT=10V
20
VCC = VOPR+0.1V
GA
For AP3700
460
For AP3700A
500
V
ns
84
%
Ω
40
µA
mA
-0.3
A/V
Note 3: AP3700/A is an emitter drive controller, the PWM controller will start up only when the voltage on the OUT pin rises
up to its threshould value.
Note 4: AP3700/A performs its short circuit function by shutdown the OUT pulse when the OUT pin voltage drops below its
short circuit threshold value.
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
5
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Typical Performance Characteristics
500
300
Start-up Current (µA)
Operating Current (µA)
280
450
400
260
240
220
350
-40 -25 -10
5
20
35
50
65
80
200
-40 -25 -10
95 110 125
o
20
35
50
65
80
95 110 125
Ambient Temperature ( C)
Figure 4. Operating Current vs. Ambient Temperature
Figure 5. Start-up Current vs. Ambient Temperature
500
65
400
High Side frequency for dither
Start-up Current (µA)
Switching Frequency (KHz)
5
o
Ambient Temperature ( C)
60
Low Side frequency for dither
55
300
200
100
50
-40 -25 -10
5
20
35
50
65
80
0
95 110 125
o
1
2
3
4
5
VCC Voltage (V)
Ambient Temperature ( C)
Figure 6. Switching Frequency vs. Ambient Temperature
Mar. 2008 Rev. 1. 4
Figure 7. Start-up Current vs. VCC Voltage
BCD Semiconductor Manufacturing Limited
6
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Function Description
1. Startup Circuit
Figure 3 is the functional block diagram of AP3700/A,
and there are 3 external pins: the VCC pin, the OUT
pin and GND pin. In typical application shown by
Figure 10, the VCC pin is used for both bias supply
and feedback control. The OUT pin directly drives
external NPN transistor or MOSFET, and also
provides initial bias power for UVLO comparator.
When the IC works in PWM mode, the auxiliary
winding will supply the VCC enough operating
current.
Figure 8 shows the start-up sequence of the VCC and
the VOUT.
Figure 9. Frequency Dither Influences
the Swithcing Cycle
AP3700/A has reference switching frequency of 60
kHz, and its frequency deviation is ±2.5kHz in period
of 2ms. Figure 9 shows the frequency dither influence
to the waveform .
CH1: VCC
CH2: OUT
4. Current Limit Control
The AP3700/A employs current mode control to
improve transient response and voltage stability. In
Figure 10, the external inductor current through the
OUT pin is converted to a voltage by an internal
resistor, and this voltage will participate to control
duty cycle and peak inductor current.
Figure 8. Start-up Sequence of VCC and VOUT
2. VCC/Feedback Control
An opto-coupler and secondary constant voltage/
current controller consists of voltage feedback
network. When load is heavy, the voltage on VCC will
be lower to enlarge duty cycle; on the contrary, if load
drops, the voltage on VCC will rise to reduce duty
cycle.
3. Frequency Dither
Frequency dither is performed by periodically
spreading a single switching frequency into adjacent
frequency band, so the peak energy is spread. This
technique can improve EMI by reducing both quasipeak and average EMI emissions.
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
7
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Typical Application
R1
10/1W
Bridge D1-D4
1N4007*4
L1
330µ
R2
R4
1.5M 100k
D9
SB240
T1
EE16
L2
5.5µ
C9
470µ
C11
470µ
5V/1A
VO+
C2
4.7µ
+
+
C3
2200p
+
R13
6.2k
Rs
0.2
VOD5
FR107
C10
47µ
D7
1N4148
D8
1N4148
R5
4.7
Q1
APT13003
R15
2k
+
J1
AC 85-264V
+ C1
4.7µ
C8
0.1µ
R9
100k
R8
200
U3
PC817
D6
1N4148
C7
2.2n
R6
390
3
R7
510
OUT
+ C4
10µ
VCC
GND
2
U1
AP3700
3
+ C5
10µ
1
C6
3.3n
6
R10
22k
cc
VVOUT
VCTRL
1
VCC
VSENSE
5
GND
2
R12
100
R11
510
4
ICTRL
U2
AP4313
Figure 10. 5V/1A Output for Battery Charger of Mobile Phone
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
8
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Mechanical Dimensions
Unit: mm(inch)
TO-92 (Bulk Packing)
1.100(0.043)
3.430(0.135)
MIN
3.700(0.146)
3.300(0.130)
1.400(0.055)
0.360(0.014)
0.510(0.020)
0.000(0.000)
0.380(0.015)
Φ1.600(0.063)
MAX
4.700(0.185)
0.380(0.015)
0.550(0.022)
14.100(0.555)
14.500(0.571)
4.300(0.169)
4.400(0.173)
4.700(0.185)
1.270(0.050)
TYP
2.440(0.096)
2.640(0.104)
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
9
Data Sheet
LOW POWER PWM CONTROLLER FOR OFF-LINE BATTERY CHARGER
AP3700/A
Mechanical Dimensions (Continued)
TO-92 (Ammo Packing)
Unit: mm(inch)
1.100(0.043)
1.270(0.050)
Typ
4.500(0.177)
5.500(0.217)
0.360(0.014)
3.700(0.146)
0.000(0.000)
0.380(0.015)
1.600(0.063)
MAX
14.000(0.551)
0.510(0.020)
13.000(0.512)
3.300(0.130)
1.400(0.055)
3.430(0.135)
MIN
4.700(0.185)
4.300(0.169)
4.400(0.173)
4.700(0.185)
0.380(0.015)
0.550(0.022)
2.540(0.100)
Typ
Mar. 2008 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
10
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
IMPORTANT NOTICE
BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any
particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
MAIN SITE
- Headquarters
BCD
Semiconductor Manufacturing Limited
BCD
Semiconductor
Manufacturing Limited
- Wafer
Fab
No.
1600, Zi
Xing Road,
Shanghai ZiZhu
Science-basedLimited
Industrial Park, 200241, China
Shanghai
SIM-BCD
Semiconductor
Manufacturing
Tel:
Fax: +86-21-24162277
800,+86-21-24162266,
Yi Shan Road, Shanghai
200233, China
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008
REGIONAL SALES OFFICE
Shenzhen OfficeSALES OFFICE
REGIONAL
- Wafer
FabSemiconductor Manufacturing Limited
BCD
Shanghai
SIM-BCD
Semiconductor Manufacturing Co., Ltd.
- IC Design
Group
800 Yi
Shan Road,
Shanghai
200233,
China Corporation
Advanced
Analog
Circuits
(Shanghai)
Tel: +86-21-6485
1491,YiFax:
0008200233, China
8F, Zone B, 900,
Shan+86-21-5450
Road, Shanghai
Tel: +86-21-6495 9539, Fax: +86-21-6485 9673
Taiwan Office
Shanghai
Semiconductor Manufacturing Co., Ltd., Shenzhen Office
BCD Taiwan
Semiconductor
Shenzhen SIM-BCD
Office
Office (Taiwan) Company Limited
Room
E, 5F,
Noble Center,
No.1006,Manufacturing
3rd Fuzhong Road,
Futian
District,Office
Shenzhen,
4F, 298-1,
Guang Road,(Taiwan)
Nei-Hu District,
Taipei,
Shanghai
SIM-BCD
Semiconductor
Co., Ltd.
Shenzhen
BCDRui
Semiconductor
Company
Limited
518026,
China
Taiwan
Advanced
Analog Circuits (Shanghai) Corporation Shenzhen Office
4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,
Tel:
+86-755-8826
Tel: +886-2-2656
2808
Room
E, 5F, Noble 7951
Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China
Taiwan
Fax:
+86-755-88267951
7865
Fax: +886-2-2656
28062808
Tel: +86-755-8826
Tel: +886-2-2656
Fax: +86-755-8826 7865
Fax: +886-2-2656 2806
USA Office
BCD Office
Semiconductor Corp.
USA
30920Semiconductor
Huntwood Ave.Corporation
Hayward,
BCD
CA 94544,
USA Ave. Hayward,
30920
Huntwood
Tel :94544,
+1-510-324-2988
CA
U.S.A
Fax:: +1-510-324-2988
+1-510-324-2788
Tel
Fax: +1-510-324-2788
Similar pages