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AP3706P-E1 [BCDSEMI]

PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS; 一次侧控制IC进行离线电池充电器
AP3706P-E1
型号： AP3706P-E1
厂家： BCD SEMICONDUCTOR MANUFACTURING LIMITED    BCD SEMICONDUCTOR MANUFACTURING LIMITED
描述：

PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS
一次侧控制IC进行离线电池充电器

电池
文件： 总13页 (文件大小：275K)
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Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
General Description  
Features  
The AP3706 is a high performance AC/DC power sup-  
ply controller for battery charger and adapter applica-  
tions. The device uses Pulse Frequency Modulation  
(PFM) method to build discontinuous conduction  
mode (DCM) flyback power supplies.  
·
·
Primary Side Control for Rectangular Constant  
Current and Constant Voltage Output  
Eliminates Opto-Coupler and Secondary CV/CC  
Control Circuitry  
Eliminates Control Loop Compensation Circuitry  
Flyback Topology in DCM Operation  
Random Frequency Modulation to Reduce  
System EMI  
Valley Turn on of External Power NPN Transistor  
Built-in Soft Start  
Open Circuit Protection  
·
·
·
The AP3706 provides constant voltage, constant cur-  
rent (CV/CC) regulation without requiring an opto-  
coupler and secondary control circuitry. It also elimi-  
nates the need of loop compensation circuitry while  
maintaining stability.  
·
·
·
The AP3706 achieves excellent regulation and high · Over Voltage Protection  
power efficiency, the no-load power consumption is  
less than 200mW at 265VAC input.  
·
Short Circuit Protection  
Applications  
The AP3706 is available in SOIC-8 and DIP-8 pack-  
ages.  
·
·
Adapters/Chargers for Cell/Cordless Phones,  
PDAs, MP3 and Other Portable Apparatus  
Standby and Auxiliary Power Supplies  
SOIC-8  
DIP-8  
Figure 1. Package Types of AP3706  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
1
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Pin Configuration  
M/P Package  
(SOIC-8/DIP-8)  
CS  
COMP  
1
2
8
7
VCC  
OUT  
GND  
BIAS  
VDD  
FB  
3
4
6
5
Figure 2. Pin Configurations of AP3706 (Top View)  
Pin Description  
Pin Number  
Pin Name  
CS  
Function  
The primary current sense  
1
2
3
4
5
6
7
8
VCC  
OUT  
GND  
FB  
Supply voltage  
This pin drives the base of external power NPN switch  
Ground  
The voltage feedback from the auxiliary winding  
The 5V output of the internal voltage regulator  
This pin sets the bias current inside AP3706 with an external resistor to GND  
This pin connects a bypass capacitor for CC function  
VDD  
BIAS  
COMP  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
2
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Functional Block Diagram  
VCC  
2
UVLO  
pro  
OVP  
&
6
5
VDD  
OCkP  
FB  
Regulator  
UVLO  
&
Bias  
0.1V  
COMP  
Tonsec  
Tons  
Detector  
7
3
pfm  
BIAS  
OUT  
EA  
Vea  
V+  
S&H  
4.0V  
Tons  
COMP  
pfm  
CV_ctrl  
R
S
Q
Driver  
pfm_d  
V+  
Vea  
1
t
CS  
COMP  
COMP  
0.5V  
pfm  
pfm_d  
LEB Delay  
430ns  
0.46V  
VDD  
I
Tons  
8
4
CC_ctrl  
COMP  
R
S
Q
3.75V  
COMP  
GND  
0.75*I  
Figure 3. Functional Block Diagram of AP3706  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
3
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Ordering Information  
AP3706  
-
E1: Lead Free  
G1: Green  
Circuit Type  
Package  
M: SOIC-8  
P: DIP-8  
TR: Tape and Reel  
Blank: Tube  
Part Number  
Marking ID  
Temperature  
Package  
Packing Type  
Range  
Lead Free  
AP3706M-E1  
AP3706MTR-E1  
AP3706P-E1  
Green  
Lead Free  
Green  
3706M-G1  
3706M-G1  
AP3706M-G1  
AP3706MTR-G1  
AP3706P-G1  
3706M-E1  
3706M-E1  
Tube  
Tape & Reel  
Tube  
SOIC-8  
DIP-8  
-40 to 85oC  
AP3706P-E1 AP3706P-G1  
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  
-0.3 to 30  
-0.3 to 7  
Unit  
V
Supply Voltage VCC  
Voltage at CS, BIAS, OUT, VDD, COMP to GND  
FB input (Pin 5)  
V
-40 to 10  
V
Output Current at OUT  
Internally limited  
0.657  
A
Power Dissipation at TA=25oC  
Operating Junction Temperature  
Storage Temperature  
W
oC  
oC  
oC  
150  
-65 to 150  
300  
Lead Temperature (Soldering, 10s)  
Thermal Resistance Junction-to-Ambient  
ESD (Machine Model)  
oC/W  
V
190  
200  
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.  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
4
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Electrical Characteristics  
o
(V =15V, T =25 C, unless otherwise specified.)  
CC  
A
Parameter  
Symbol  
Conditions  
Min  
Typ  
Max  
Unit  
UVLO SECTION  
VTH (ST)  
Start-up Threshold  
17  
18.5  
7.3  
20  
V
V
Minimal Operating Voltage  
VOPR(min) After turn on  
6.5  
8.1  
REFERENCE VOLTAGE SECTION  
RBIAS=200kΩ,  
Before turn on  
VBIAS  
VDD  
BIAS Pin Voltage  
1.170  
4.75  
1.205  
5.0  
1.240  
5.25  
V
V
VDD Pin Voltage  
STANDBY CURRENT SECTION  
VCC = VTH (ST)-0.5V,  
IST  
Start-up Current  
70  
80  
μA  
μA  
RBIAS=200kΩ, Before turn on  
Operating Current  
ICC(OPR) RBIAS=200kΩ  
680  
900  
DRIVE OUTPUT SECTION  
Sink  
50  
25  
IOUT  
RBIAS=200kΩ  
OUT Maximum Current  
mA  
Source  
30  
CURRENT SENSE SECTION  
VCS  
VCS(PRE)  
Current Sense Threshold  
490  
440  
510  
460  
430  
530  
480  
mV  
mV  
ns  
Pre-Current Sense  
Leading Edge Blanking  
FEEDBACK INPUT SECTION  
Feedback Pin Input Leakage  
Current  
IFB  
VFB=4V  
10.0  
12.5  
15.0  
μA  
VFB  
Feedback Threshold  
3.90  
-0.9  
4.00  
-0.7  
4.10  
-0.5  
V
V
VFB(EN)  
Enable Turn-on Voltage  
COMP THRESHOLD VOLTAGE SECTION  
VCOMP  
Turn-on Threshold Voltage  
3.42  
7
3.60  
8
3.78  
9
V
V
PROTECTION SECTION  
VFB(OVP)  
Over Voltage Protection  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
5
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Typical Performance Characteristics  
100  
90  
80  
70  
60  
50  
40  
30  
20  
19.5  
19.0  
18.5  
18.0  
17.5  
17.0  
16.5  
RBIAS=200kΩ  
RBIAS=200kΩ  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
Ambient Temperature (oC)  
Ambient Temperature (oC)  
Figure 4. Start-up Voltage vs. Ambient Temperature  
Figure 5. Start-up Current vs. Ambient Temperature  
800  
750  
700  
650  
600  
550  
500  
5.20  
5.15  
5.10  
5.05  
5.00  
4.95  
4.90  
4.85  
4.80  
450  
RBIAS=200kΩ  
400  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
Ambient Temperature (oC)  
Ambient Temperature (oC)  
Figure 7. VDD vs. Ambient Temperature  
Figure 6. Operating Current vs. Ambient Temperature  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
6
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Typical Performance Characteristics (Continued)  
120  
110  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
80  
70  
60  
TA=25oC  
150  
TA=25oC  
150  
50  
40  
100  
200  
250  
300  
350  
400  
100  
200  
250  
300  
350  
400  
Bias Resistor (kΩ)  
Bias Resistor (kΩ)  
Figure 9. OUT Source Current vs. Bias Resistor  
Figure 8. Start-up Current vs. Bias Resistor  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
7
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Operation Description  
Bridge  
Vg  
VS  
VO  
D1  
VIN  
+
IS  
+
C1  
CO  
IO  
NP  
NS  
LM  
VAUX  
NAUX  
Q1  
OUT  
AP3706  
IP  
FB  
GND  
CS  
RCS  
Figure 10. Simplified Flyback Converter Controlled by AP3706  
Figure 10 illustrates a simplified flyback converter  
controlled by AP3706.  
The energy stored in the magnetizing inductance LM  
each cycle is therefore:  
Constant Primary Peak Current  
The primary current ip(t) is sensed by a current sense  
1
................(3)  
Eg = ×LM ⋅ Ipk2  
2
resistor R as shown in Figure 10.  
CS  
So the power transferring from the input to the output  
is given by:  
The current rises up linearly at a rate of:  
1
P = ×LM ×Ipk2 × fSW  
dip(t) vg(t)  
................(4)  
................(1)  
=
2
dt  
LM  
Where the fsw is the switching frequency. When the  
peak current Ipk is constant, the output power depends  
on the switching frequency fsw.  
See equation 2  
Constant Voltage Operation  
Ip  
The AP3706 captures the auxiliary winding feedback  
voltage at FB pin and operates in constant-voltage  
(CV) mode to regulate the output voltage. Assuming  
the secondary winding is master, the auxiliary winding  
is slave during the D1 on-time. The auxiliary voltage  
is given by:  
0A  
Figure 11. Primary Current Waveform  
As illustrated in Figure 11, when the current ip(t) rises  
up to Ipk, the switch Q1 turns off. The constant peak  
current is given by:  
NAUX  
................(5)  
Vcs  
VAUX  
=
×
(
Vo +Vd  
)
................(2)  
Ipk =  
NS  
Rcs  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
8
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Operation Description (Continued)  
Where the Vd is the diode forward drop voltage.  
The relationship between the output constant-current  
and secondary peak current Ipks is given by:  
See equation 5  
1
Tons  
................(7)  
Iout = ×Ipks×  
2
Tons+Toffs  
At the instant of D1 turn-on, the primary current  
transfers to the secondary at an amplitude of:  
0V  
2/3 Tons  
Tons  
NP  
................(8)  
Ipks =  
× Ipk  
NS  
Figure 12. Auxiliary Voltage Waveform  
Thus the output constant-current is given by:  
The output voltage is different from the secondary  
voltage in a diode forward drop voltage. The diode  
drop voltage depends on the current. If the secondary  
voltage is always detected at a constant secondary  
current, the difference between the output voltage and  
the secondary voltage will be a fixed Vd. The voltage  
detection point is at two-thirds of the D1 on-time. The  
CV loop control function of AP3706 then generates a  
D1 off-time to regulate the output voltage.  
NP  
NP  
2
1
Tons  
Iout = ×  
2 NS  
×Ipk×  
= ×  
×Ipk  
Tons+Toffs 7 NS  
................(9)  
Leading Edge Blanking  
When the power switch is turned on, a turn-on spike  
will occur on the sense-resistor. To avoid false-  
termination of the switching pulse, a 430ns leading-  
edge blanking is built in. During this blanking period,  
the current sense comparator is disabled and the gate  
driver can not be switched off.  
Constant Current Operation  
The AP3706 is designed to work in constant-current  
(CC) mode. Figure 13 shows the secondary current  
waveforms.  
See equation 8  
CCM Protection  
The AP3706 is designed to operate in discontinuous  
conduction mode (DCM) in both CV and CC modes.  
To avoid operating in continuous conduction mode  
(CCM), the AP3706 detects the falling edge of the FB  
input voltage on each cycle. If a 0.1V falling edge of  
FB is not detected, the AP3706 will stop switching.  
Iout  
Is  
0A  
Toffs  
Tons  
Figure 13. Secondary Current Waveform  
OVP & OCkP  
The AP3706 includes output over-voltage protection  
(OVP) and open circuit protection (OCkP) circuitry as  
shown in Figure 14. If the voltage at FB pin exceeds  
8V, 100% above the normal detection voltage, or the  
-0.7V falling edge of the FB input can not be  
monitored, the AP3706 will immediately shut off and  
enters hiccup mode. The AP3706 sends out a fault  
detection pulse every 8ms in hiccup mode until the  
fault has been removed.  
In CC operation, the CC loop control function of  
AP3706 will keep a fixed proportion between D1 on-  
time Tons and D1 off-time Toffs by discharging or  
charging the capacitance connected in COMP pin. The  
fixed proportion is  
Tons  
Toffs  
4
3
=
................(6)  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
9
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Operation Description (Continued)  
FB  
COMP  
pro  
8V  
R
S
Q
COMP  
-0.7V  
Timer_8ms  
UVLO  
Figure 14. OVP and OCkP Function Block  
Typical Application  
Bridge  
D2  
5V/1A  
T1  
VO+  
+
+
R1  
C6  
C1  
+
J1  
D1  
C2  
Z1  
R6  
AC 85-264V  
VO-  
R2  
R3  
Q1  
VCC  
CS  
OUT  
R9  
C5  
AP3706  
BIAS  
FB  
GND COMP VDD  
R7  
R10  
R11  
R8  
R4  
R5  
C3  
C4  
Figure 15. 5V/1A Output for Battery Charger of Mobile Phone  
BCD Semiconductor Manufacturing Limited  
Jul. 2008 Rev. 1.3  
10  
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Mechanical Dimensions  
SOIC-8  
Unit: mm(inch)  
4.700(0.185)  
0.320(0.013)  
1.350(0.053)  
5.100(0.201)  
1.750(0.069)  
0.675(0.027)  
0.725(0.029)  
D
5.800(0.228)  
6.200(0.244)  
1.270(0.050)  
TYP  
D
20:1  
φ
0.800(0.031)  
0.200(0.008)  
0.100(0.004)  
0.300(0.012)  
0°  
8°  
1.000(0.039)  
3.800(0.150)  
4.000(0.157)  
0.190(0.007)  
0.250(0.010)  
1°  
5°  
0.330(0.013)  
0.510(0.020)  
0.900(0.035)  
6)  
00  
(0.  
50  
.1  
R0  
0.450(0.017)  
0.800(0.031)  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
11  
Data Sheet  
PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706  
Mechanical Dimensions (Continued)  
DIP-8  
Unit: mm(inch)  
0.700(0.028)  
7.620(0.300)TYP  
5°  
1.524(0.060) TYP  
6°  
3.200(0.126)  
3.600(0.142)  
3.710(0.146)  
4.310(0.170)  
0.510(0.020)MIN  
3.000(0.118)  
3.600(0.142)  
0.204(0.008)  
0.360(0.014)  
0.254(0.010)TYP  
8.200(0.323)  
9.400(0.370)  
2.540(0.100)TYP  
0.130(0.005)MIN  
0.360(0.014)  
0.560(0.022)  
6.200(0.244)  
6.600(0.260)  
R0.750(0.030)  
Φ3.000(0.118)  
Depth  
0.100(0.004)  
0.200(0.008)  
9.000(0.354)  
9.400(0.370)  
Jul. 2008 Rev. 1.3  
BCD Semiconductor Manufacturing Limited  
12  
BCD Semiconductor Manufacturing Limited  
http://www.bcdsemi.com  
- Headquarters  
- Wafer Fab  
BCD Semiconductor Manufacturing Limited  
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.  
No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China  
800 Yi Shan Road, Shanghai 200233, China  
Tel: +86-21-24162266, Fax: +86-21-24162277  
Tel: +86-21-6485 1491, Fax: +86-21-5450 0008  
REGIONAL SALES OFFICE  
Shenzhen Office  
Taiwan Office  
USA Office  
Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office  
BCD Semiconductor (Taiwan) Company Limited  
BCD Semiconductor Corp.  
Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen,  
4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei,  
30920 Huntwood Ave. Hayward,  
518026, China  
Taiwan  
Tel: +886-2-2656 2808  
CA 94544, USA  
Tel: +86-755-8826 7951  
Tel : +1-510-324-2988  
Fax: +86-755-8826 7865  
Fax: +886-2-2656 2806  
Fax: +1-510-324-2788  

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