AP3783RCK6TR-G1 [DIODES]

PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER;
AP3783RCK6TR-G1
型号: AP3783RCK6TR-G1
厂家: DIODES INCORPORATED    DIODES INCORPORATED
描述:

PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER

开关
文件: 总17页 (文件大小:582K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
AP3783R  
PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER  
Description  
Pin Assignments  
The AP3783R is a high frequency, high efficiency and high accuracy  
switching mode power supply controller to drive power MOSFET for  
5V/2A battery charger/adapter applications. 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 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 equals to the maximum system  
output current.  
(Top View)  
Pin 1 Mark  
6
5
4
CS  
GND  
VCC  
1
2
3
CPC  
DRI  
FB  
The AP3783R provides accurate constant voltage (CV), constant  
current (CC) and outstanding dynamic performance without requiring  
an opto-coupler. It also eliminates the need of loop compensation  
circuitry while maintaining stability.  
SOT26  
The AP3783R provides valley turn-on function and 3-Segment drive  
current to improve the power supply EMI performance. The AP3783R  
also has built-in fixed cable voltage drop compensation (8%, 4% and  
2% of nominal system output voltage to meet various cables with  
different length and gauge) and adjustable line voltage compensation.  
Features  
Less than 30mW Standby Power Consumption  
Meet Efficiency Requirement of COC Trier2  
The AP3783R achieves excellent regulation and high average  
efficiency, less than 2s startup time for 30mW standby power solution.  
When AP3783R is used with APR3415, good undershoot and  
efficiency performances can be achieved.  
Valley Turn-on to Reduce Switching Loss and Improve EMI  
Piece-wise Frequency Reduction to Enhance Conversion  
Efficiency and Suppress Audio Noise  
Over Voltage Protection (OVP)  
Over Temperature Protection (OTP)  
The AP3783R is packaged in SOT26.  
Short Circuit Protection (SCP) with Hiccup  
3-Segment Drive Current for Radiative EMI Suppression  
Operating Frequency Jitter Function for Conductive EMI  
Suppression  
Drive MOSFET for 5W to 20W Battery Charger/Adapter  
Applications  
Applications  
SOT26 SMD Package Comply with Level 3 of IPC/JEDEC J-STD-  
033A  
Adapters/Chargers  
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  
Halogen and Antimony Free. “Green” Device (Note 3)  
Standby and Auxiliary Power Supplies  
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.  
1 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Typical Applications Circuit  
FR1  
T1  
DIN  
LIN  
C1  
R1  
RST1  
Np  
Na  
COUT  
+
Ns  
+
+
D1  
R0  
Ra  
RST2  
C2  
C
IN1  
C
IN2  
R2  
Da  
+
U2  
APR3415  
5V/2A  
CVCC  
DRAIN  
GND  
GND  
VCC  
R3  
DRAIN  
VDET  
R4  
U1  
C3  
R5  
CCPC  
DRISR  
AREF  
1
6
CS  
CPC  
Q1  
C4  
RFB1  
2
3
5
DRI  
FB  
GND  
VCC  
4
AP3783R  
CY1  
RFB2  
RCS  
With APR3415 (VOUT=5V/2A)  
Pin Descriptions  
Pin Number  
Pin Name  
Function  
The CS is the current sense pin of the IC. The IC will turn off the power MOSFET  
according to the voltage on the CS pin  
1
CS  
2
3
GND  
VCC  
The ground of the controller  
The VCC pin supplies the power for the IC. In order to get the correct operation of  
the IC, a capacitor with low ESR should be placed as close as possible to the VCC  
pin  
4
5
FB  
The CV and CC regulation are realized based on the voltage sampling of this pin  
Output pin to drive external MOSFET  
DRI  
A capacitor about 50nF should be connected to this pin. The voltage of CPC pin is  
linear to load of the system and it is used for the functions of cable voltage drop  
compensation and audio noise suppression  
6
CPC  
2 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Functional Block Diagram  
VCC  
3
CS  
OVP/SCP/OTP/  
OCkP/Max tONP  
Regulator  
Pro  
PFM  
tONS  
UVLO  
&
Bias  
tONS  
Detector  
tDELAY  
0.83V  
Timer  
tOFF  
COMP  
4
2
t 256ms  
FB  
GND  
Dynamic  
Response  
tDELAY  
Dyn  
UV/OV  
PFM  
UV/OV  
Valley  
_on  
LL Mode  
CV_CTRL  
Constant Voltage  
Control  
Q
R
S
EA  
VFB_REF  
5
Driver  
DRI  
Line  
Compensation  
VLINE  
VCS_REF  
Peak  
Current  
Control  
& LEB  
VCS_X  
VLOAD  
Shutdown  
VCS_X Select  
UV Detect_on  
CC_CTRL  
1
CS  
tONS  
Constant Current  
Control  
Q
R
S
Vload  
VCPC  
Cable  
Compensation  
LL Mode  
Light Load  
Detection  
Low Pass Filter  
VCS_X  
t 256ms  
6
CPC  
3 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Absolute Maximum Ratings (Note 4)  
Symbol  
VCC  
Parameter  
Rating  
-0.3 to 35  
-0.3 to 7  
-0.4 to 10  
Internally Limited  
-40 to +150  
-65 to +150  
+300  
Unit  
V
Supply Voltage  
VCS, VCPC  
VFB  
Voltage on CS, CPC Pin  
V
FB Input Voltage  
V
ISOURCE  
TJ  
Source Current from OUT Pin  
Operating Junction Temperature  
Storage Temperature  
A
ºC  
ºC  
ºC  
ºC /W  
V
TSTG  
TLEAD  
θJA  
Lead Temperature (Soldering, 10 sec)  
Thermal Resistance (Junction to Ambient)  
ESD (Human Body Model)  
ESD (Charged Device Model)  
200  
6000  
ESD  
400  
V
Note 4: 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.  
Electrical Characteristics (@VCC=15V, TA=+25°C, unless otherwise specified.)  
Symbol  
Parameter  
Conditions  
Min  
Typ  
Max  
Unit  
STARTUP AND UVLO SECTION  
VTH_ST  
Startup Threshold  
13  
6
15.5  
6.8  
18  
V
V
VOPR(MIN)  
Minimal Operating Voltage  
7.6  
STANDBY CURRENT SECTION  
VCC=VTH_ST-1V before  
startup  
IST  
Startup Current  
0
0.2  
0.6  
mA  
ICC_OPR  
Operating Current  
Static current @ no load  
350  
500  
650  
DRIVING OUTPUT SECTION  
VGATE  
Gate Voltage  
10  
38  
11  
43  
12  
48  
V
ISOURCE_L  
ISOURCE_H  
Low Driver Source Current  
High Driver Source Current  
mA  
mA  
100  
110  
120  
High/Low Drive Source Current  
Threshold Voltage  
VTH  
6
6.5  
6.5  
7
V
RSINK  
Sink Resistance  
5.5  
7.5  
  
OPERATING FREQUENCY SECTION (LL MODE TO FULL LOAD)  
fS(MAX)  
Maximum Operating Frequency  
IO(MAX) (Note 5)  
70  
4.6  
kHz  
μs  
tSAMPLE_H  
tSAMPLE_L  
OPERATING FREQUENCY SECTION (LL MODE)  
37% to 100% IO(MAX)  
0% to 37% IO(MAX) (Note 6)  
3.8  
2.15  
4.2  
2.4  
Sample Time  
2.65  
μs  
VCPC(EN)  
VCPC(EX)  
tOFF(EN)  
tOFF(EX)  
CPC Pin Voltage to Enter LL Mode  
CPC Pin Voltage to Exit LL Mode  
Off Time to Enter LL Mode  
18  
36  
20  
40  
22  
44  
mV  
mV  
μs  
From the end of tONS  
From the end of tONS  
230  
230  
256  
256  
282  
282  
Off Time to Exit LL Mode  
μs  
4 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Electrical Characteristics (Cont.) (@VCC=15V, TA=+25°C, unless otherwise specified.)  
Symbol  
Parameter  
Conditions  
Min  
Typ  
Max  
Unit  
FREQUENCY JITTER  
ΔVCS/VCS  
VCS Modulation  
4.5  
3.6  
5
4
5.5  
4.4  
%
6.5% to 100% IO(MAX)  
fMOD  
VCS Modulation Frequency  
kHz  
CURRENT SENSE SECTION  
VCS_H  
37% to 100% IO(MAX)  
0% to 37% IO(MAX)  
(Note 7)  
828  
460  
245  
400  
900  
500  
260  
500  
972  
540  
275  
600  
mV  
mV  
  
Peak Current Sense Threshold  
Voltage  
VCS_L  
RLINE  
tLEB  
Built-in Line Compensation Resistor  
Leading Edge Blanking  
(Note 6)  
ns  
CONSTANT VOLTAGE SECTION  
VFB  
RFB  
Feedback Threshold Voltage  
Closed loop test of VOUT  
VFB=4V  
3.95  
560  
7
4.01  
700  
8
4.07  
840  
9
V
k  
%
FB Pin Input Resistance  
AP3783RA  
VCABLE/VOUT  
%
Cable Compensation Ratio  
AP3783RB  
3
4
5
%
AP3783RC  
1
2
3
%
CONSTANT CURRENT SECTION  
Secondary Winding Conduction  
Duty  
VALLEY-ON SECTION  
tONS/tSW  
VFB=4V  
0.47  
14.4  
74  
0.5  
16  
83  
0.53  
17.6  
92  
  
μs  
mV  
tVAL-ON  
Valid Off Time of Valley-on  
From the end of tONS  
DYNAMIC SECTION  
Trigger Voltage for Dynamic  
Function  
VTRIGGER  
tDELAY  
VUV_H  
Delay Time for Dynamic Function  
From the end of tONS  
115  
3.82  
6
128  
3.89  
8
141  
3.96  
10  
μs  
V  
Under Voltage of FB Pin for VCS_H  
Maximum Off Time  
tOFF(MAX)  
ms  
PROTECTION FUNCTION SECTION  
VFB(OVP)  
VCC(OVP)  
tONP(MAX)  
VFB(SCP)  
tSCP  
Over Voltage Protection at FB Pin  
7.1  
28  
7.5  
30  
7.9  
32  
V
V
Over Voltage Protection at VCC Pin  
Maximum Turn-on Time  
13  
19  
25  
μs  
V
Short Circuit Protection  
VFB @ Hiccup  
2.45  
115  
+126  
+36  
2.6  
2.75  
141  
+154  
+44  
Maximum Time under VFB(SCP)  
Shutdown Temperature  
128  
+140  
+40  
ms  
ºC  
ºC  
TOTP  
THYS  
Temperature Hysteresis  
Notes: 5. The output constant-current design value, generally set to 110% to 120% of full load.  
6. Guaranteed by design.  
7. Line compensation voltage on CS reference:  
RLINE  
Δ VCS _ REF 0.438  
VAUX  
RFB1 RLINE  
5 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Performance Characteristics  
Start-up Voltage vs. Ambient Temperature  
Start-up Current vs. Ambient Temperature  
17.0  
16.5  
16.0  
15.5  
15.0  
14.5  
14.0  
13.5  
1.0  
0.8  
0.6  
0.4  
0.2  
0.0  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
Ambient Temperature (oC)  
Ambient Temperature (oC)  
Minimal Operating Voltage vs. Ambient Temperature  
Operating Current vs. Ambient Temperature  
700  
8
600  
500  
400  
300  
200  
7
6
5
4
3
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
Ambient Temperature (oC)  
Ambient Temperature (oC)  
Sink Resistance vs. Ambient Temperature  
High Source Current vs. Ambient Temperature  
14  
140  
12  
10  
8
120  
100  
80  
6
4
60  
2
0
-40  
40  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
-20  
0
20  
40  
60  
80  
100  
120  
140  
Ambient Temperature (oC)  
Ambient Temperature (oC)  
6 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Performance Characteristics (Cont.)  
Feedback Voltage vs. Ambient Temperature  
Gate Voltage vs. Ambient Temperature  
5.0  
14  
13  
12  
11  
10  
9
4.5  
4.0  
3.5  
3.0  
2.5  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
Ambient Temperature (oC)  
Ambient Temperature (oC)  
Input Resistance of FB Pin vs.  
Ambient Temperature  
Line Compensation Resistance vs.  
Ambient Temperature  
1200  
1100  
1000  
900  
500  
400  
300  
200  
100  
0
800  
700  
600  
500  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
-40  
-20  
0
20  
40  
60  
80  
100  
120  
140  
Ambient Temperature (oC)  
Ambient Temperature (oC)  
7 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Operation Principle Description  
FR1  
T1  
DIN  
LIN  
C1  
R1  
RST1  
Np  
Na  
COUT  
+
Ns  
+
+
D1  
R0  
Ra  
RST2  
C2  
C
IN1  
C
IN2  
R2  
Da  
+
U2  
APR3415  
5V/2A  
CVCC  
DRAIN  
GND  
GND  
VCC  
R3  
DRAIN  
VDET  
R4  
U1  
C3  
R5  
CCPC  
DRISR  
AREF  
1
6
CS  
CPC  
Q1  
C4  
RFB1  
2
3
5
DRI  
FB  
GND  
VCC  
4
AP3783R  
CY1  
RFB2  
RCS  
Figure 1. Typical Application Circuit of AP3783R  
Figure 1 is the typical application circuit of AP3783R, which is a conventional Flyback converter with a 3-winding transformer---primary winding  
(NP), secondary winding (NS) and auxiliary winding (NAUX). The auxiliary winding is used for providing VCC supply voltage for IC and sensing the  
output voltage feedback signal to FB pin.  
IPK  
IP  
IPKS  
tOFFS  
IS  
VA  
VAUX  
tSW  
VO  
VSEC  
tONS  
tONP  
tOFF  
Figure 2. The Operation Waveform of Flyback PSR System  
8 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Operation Principle Description (Cont.)  
Figure 2 shows the typical waveforms which demonstrate the basic operating principle of AP3783R application. And the parameters are defined as  
following.  
IP---The primary side current  
IS ---The secondary side current  
IPK---Peak value of primary side current  
IPKS---Peak value of secondary side current  
VSEC---The transient voltage at secondary winding  
VO---The output voltage  
VAUX---The transient voltage at auxiliary winding  
VA--- The stable voltage at auxiliary winding when rectification diode is in conducting status, which equals the sum of voltage VCC and the forward  
voltage drop of auxiliary diode  
tSW ---The period of switching frequency  
tONP ---The conduction time when primary side switch is “ON”  
tONS ---The conduction time when secondary side diode is “ON”  
tOFF ---The dead time when neither primary side switch nor secondary side diode is “ON”  
tOFFS --- The time when secondary side diode is “OFF”  
For primary-side regulation, the primary current ip(t) is sensed by a current sense resistor RCS (as shown in Figure 1).The current rises up linearly  
at a rate of:  
dip(t) V (t)  
IN  
(1)  
dt  
LM  
As illustrated in Figure 2, when the current ip(t) rises up to IPK, the switch Q1 turns off. The constant peak current is given by:  
VCS  
(2)  
IPK  
RCS  
The energy stored in the magnetizing inductance LM each cycle is therefore:  
1
2
(3)  
Eg   LM IPK  
2
So the power transferring from the input to the output is given by:  
1
P   LM IPK 2 fSW  
(4)  
2
Where, the fSW is the switching frequency. When the peak current IPK is constant, the output power depends on the switching frequency fSW  
.
Constant Voltage Operation  
As to constant-voltage (CV) operation mode, the AP3783R detects the auxiliary winding voltage at FB pin to regulate the output voltage. The  
auxiliary winding voltage is coupled with secondary side winding voltage, so the auxiliary winding voltage at tONS is:  
NAUX  
(5)  
VAUX  
Vo Vd  
NS  
Where Vd is the conduction voltage drop of MOSFET in APR3415.  
9 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Operation Principle Description (Cont.)  
See equation 5  
0V  
tSAMPLE  
tONS  
Figure 3. Auxiliary Voltage Waveform  
The voltage detection point is at a constant delay time of tONS. The constant delay time is changed with the different primary peak current. The  
CV loop control function of AP3783R then generates a tOFF to regulate the output voltage.  
Constant Current Operation  
The AP3783R can work in constant-current (CC) mode. Figure 2 shows the secondary current waveforms.  
In CC operation mode, the CC control loop of AP3783R will keep a fixed proportion between tONS and tOFFS. The fixed proportion is  
tONS  
4
4
(6)  
tOFFS  
The relationship between the output constant-current and secondary peak current Ipks is given by:  
1
2
tONS  
(7)  
IO(MAX )  
IPKS  
tONS tOFFS  
As to tight coupled primary and secondary winding, the secondary peak current is  
NP  
(8)  
IPKS  
IPK  
NS  
Thus the output constant-current is given by:  
1
2
N
tONS  
2
8
N
P IPK  
NS  
P IPK  
NS  
(9)  
IO(MAX )  
tONS tOFFS  
Therefore, AP3783R can realize CC mode operation by constant primary peak current and fixed diode conduction duty cycle.  
Multiple Segment Constant Peak Current  
As to the original PFM PSR system, the switching frequency decreases with output current decreasing, which will encounter audible noise issue  
since switching frequency decreases to audio frequency range, about less than 20kHz.  
In order to avoid audible noise issue, AP3783R uses 2-segment constant primary peak current control method. At constant voltage mode, the  
current sense threshold voltage is of multiple segments with different loading, as shown in Figure 4, which are VCS_H for high load, VCS_L for  
light load and LL Mode. At constant current mode, the current sense threshold voltage is always VCS_H  
.
10 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Operation Principle Description (Cont.)  
VCS_REF  
VCS_H  
High-load  
VCS_L  
Light-load  
fSW  
75kHz  
65kHz  
24kHz  
0.5kHz  
5%  
full load IO(MAX)  
37%  
Figure 4. Multiple Segment Peak Current at CV Mode  
It can be seen from Figure 4, with multiple segment peak current control, AP3783R power system can keep switching frequency above 24kHz  
at whole heavy load and most of light load to guarantee the audible noise free performance.  
Constant Voltage Operation in LL Mode and Dynamic Response  
In primary side regulation of AP3783R application, APR3415 must be used at secondary side as the output voltage regulator, low standby power  
and excellent dynamic response can be achieved. When the output voltage detected by APR3415 is lower than its trigger voltage, APR3415  
outputs periodical signals which will be coupled to auxiliary side. When AP3783R detects the signal which is valid that the signal voltage is higher  
than VTRIGGER and tOFF is longer than tDELAY, AP3783R will begin an operating pulse, then primary switch immediately turns on to provide one energy  
pulse to output terminal and primary VCC  
.
By fast response and cooperation, APR3415 and AP3783R can maintain a constant output voltage with very low operating frequency in LL mode  
and also can effectively improve dynamic performance for primary side regulation power system.  
The conditions of entering LL mode---VCPC<20mV and tOFF>256μs.  
The condition of exiting LL mode---VCPC 40mV or tOFF<256μs.  
The critical point of the LL mode is generally about 5% IO(MAX)  
.
3-Segment Drive Current for Radiative EMI Suppression  
When the power switch is turned on, a turn-on spike will occur, that worsens the radiative EMI. It is an effective way to decrease drive current  
before gate voltage gets to miller platform. The AP3783R uses 3-segment drive current for radiative EMI suppression, as shown in Figure 5.  
When gate voltage gets to 6V, the AP3783R drive current switches from low current (43mA) to high current (110mA). When the gate voltage  
gets to 10V, the drive current will decrease gradually to 0mA until the gate voltage goes up to the clamp voltage (11V).  
11 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Operation Principle Description (Cont.)  
11V  
10V  
Gate Voltage  
Drive Current  
High Drive Durrent=110mA  
6.5V  
Miller Platform  
Low Drive Current=43mA  
t
Figure 5. Drive Current and Gate Voltage  
Leading Edge Blanking (LEB) Time  
When the power switch is turned on, a turn-on spike will occur on the sense-resistor. To avoid false turn off switch, a leading-edge blanking is  
built in. During this blanking time, the current sense comparator is disabled and the external power switch cannot be turned off.  
Adjustable Line Compensation and Fixed Cable Compensation  
The AP3783R power system can adjust line compensation by changing the upper resistor at FB pin. The line compensation capability is  
increased by decreasing the resistance of the upper FB resistor.  
Cable compensation is fixed in AP3783R.  
Valley Turn-on  
When the off time (tOFF) is lower than 16ms, AP3783R power system can work with valley turn-on. It can reduce MOSFET switching on power  
losses which is resulted from the equivalent output capacitance. At the same time, because of valley turn-on the switching frequency has the  
random jitter feature, which will be benefit for conductive EMI performance. And valley turn-on can also reduce the power switch turn on spike  
current and then result in the better radiative EMI performance.  
Frequency Jitter  
Even though the valley turn-on function can lead the random frequency jitter feature, an active frequency jitter function is added to AP3783R to  
ensure the frequency jitter performance in the whole loading condition. By adjusting the VCS_REF with deviation of 5.0% every 256μs cycle, the  
active frequency jitter can be realized.  
Short Circuit Protection (SCP)  
Short Circuit Protection (SCP) detection principle is similar to the normal output voltage feedback detection by sensing FB pin voltage. When  
the detected FB pin voltage is below VFB(SCP) for a duration of about 128ms, the SCP is triggered. Then the AP3783R enters hiccup mode that  
the IC immediately shuts down and then restarts, so that the VCC voltage changes between VTH_ST and UVLO threshold until VFB(SCP) condition  
is removed.  
As to the normal system startup, the time duration of FB pin voltage below VFB(SCP) should be less than tSCP to avoid entering SCP mode. But  
for the output short condition or the output voltage below a certain level, the SCP mode will be triggered.  
12 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Operation Principle Description (Cont.)  
Figure 6 is the AP3783R normal start-up waveform that the voltage of FB pin is above VFB(SCP) during tSCP after VCC gets to the VTH_ST, which  
doesnt enter the SCP mode. As shown in Figure 7, VOUT is short and the voltage of FB pin is lower than VFB(SCP) during tSCP, the AP3783R  
triggers the SCP and enter the hiccup mode.  
tSCP  
VTH_ST  
VCC  
VFB(SCP)  
VFB  
5V  
VOUT(SCP)  
VOUT  
Figure 6. Normal Start-up  
tSCP  
VTH_ST  
VCC  
VOPR(MIN)  
VFB(SCP)  
VFB  
VOUT  
0V  
Figure 7. Short Circuit Protection (SCP) and Hiccup Mode  
OVP  
The AP3783R includes output over-voltage protection (OVP). If the voltage at FB pin exceeds VFB(OVP), the AP3783R immediately shuts down  
and keeps the internal circuitry enabled to discharge the VCC capacitor to the UVLO turn-off threshold. After that, the device returns to the start  
state and a start-up sequence ensues.  
OTP  
If the junction temperature reaches the threshold of +140C, AP3783R shuts down immediately. Before VCC voltage decreases to UVLO, if the  
junction temperature decreases to +100C, AP3783R can recover to normal operation. If not, the power system enters restart Hiccup mode until  
the junction temperature decreases below +100C.  
13 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Ordering Information  
AP3783R X XX XX- G1  
Cable Compensation  
Product Name  
Package  
Packing  
RoHS/Green  
Voltage  
K6 : SOT26  
A: 8%  
B: 4%  
C: 2%  
G1 : Green  
TR : Tape & Reel  
Cable  
Compensation  
Voltage  
Temperature  
Range  
Product  
Package  
Part Number  
Marking ID  
Packing  
8%  
4%  
2%  
AP3783RAK6TR-G1  
AP3783RBK6TR-G1  
AP3783RCK6TR-G1  
GNT  
GNW  
GPT  
3000/Tape & Reel  
3000/Tape & Reel  
3000/Tape & Reel  
AP3783R  
SOT26  
-40 to +85C  
Marking Information  
(Top View)  
: Logo  
XXX: Marking ID  
XXX  
14 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Package Outline Dimensions (All dimensions in mm(inch).)  
(1) Package Type: SOT26  
0°  
8°  
2.820(0.111)  
3.100(0.122)  
0.300(0.012)  
0.500(0.020)  
0.200(0.008)  
0.300(0.012)  
0.600(0.024)  
5
2
6
4
Pin 1 Mark  
1
3
0.700(0.028)REF  
0.950(0.037)TYP  
0.100(0.004)  
0.200(0.008)  
0.000(0.000)  
0.150(0.006)  
1.800(0.071)  
2.000(0.079)  
0.900(0.035)  
1.300(0.051)  
1.450(0.057)  
MAX  
15 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
Suggested Pad Layout  
(1) Package Type: SOT26  
E
E
Y
Z
G
X
Z
G
X
Y
E
Dimensions  
(mm)/(inch)  
(mm)/(inch)  
(mm)/(inch)  
(mm)/(inch)  
(mm)/(inch)  
Value  
3.600/0.142  
1.600/0.063  
0.700/0.028  
1.000/0.039  
0.950/0.037  
16 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  
AP3783R  
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.  
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the  
final and determinative format released by Diodes Incorporated.  
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.  
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the  
failure of the life support device or to affect its safety or effectiveness.  
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and  
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any  
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related  
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its  
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.  
Copyright © 2016, Diodes Incorporated  
www.diodes.com  
17 of 17  
www.diodes.com  
March 2016  
© Diodes Incorporated  
AP3783R  
Document number: DS37448 Rev. 6 - 2  

相关型号:

AP3783R_16

PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
DIODES

AP3783_17

PRIMARY SIDE REGULATED SWITCHING MODE POWER SUPPLY CONTROLLER
DIODES

AP3801GM

P-CHANNEL ENHANCEMENT MODE POWER MOSFET
A-POWER

AP3842

High Performance Current Mode PWM Controller
ANACHIP

AP3842CM

CURRENT MODE PWM CONTROLLER
BCDSEMI

AP3842CM-E1

CURRENT MODE PWM CONTROLLER
BCDSEMI

AP3842CM-E1

CURRENT MODE PWM CONTROLLER
DIODES

AP3842CM-G1

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, GREEN, SOIC-8
DIODES

AP3842CMTR

CURRENT MODE PWM CONTROLLER
BCDSEMI

AP3842CMTR-E1

CURRENT MODE PWM CONTROLLER
BCDSEMI

AP3842CMTR-E1

CURRENT MODE PWM CONTROLLER
DIODES

AP3842CMTR-G1

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, GREEN, SOIC-8
DIODES