当前位置:首页 >> 信息与通信 >>

ap8012小功率开关电源芯片


1

AP8012

Chipown
GREEN POWER OFF LINE SMPS PRIMARY SWITCHE
Applications
Power AC/DC Adapters for Chargers DVD/VCD power supplies Electromagnetic Oven powe

r supplies Air Conditioner power supplies STB power supplies AC/DC LED Driver Applications

Features
85v to 265v wide range AC voltage input A 700v MOSFET on the same silicon chip Auto start up with high voltage current source PWM with current mode control 9v to 38v wide range VCC voltage Fixed 60KHz switching frequency Automatic skip cycle mode in low load condition. Over temperature, over current and over voltage protection Auxiliary under voltage lockout with hysteresis

Package
Type European (195-265 Vac) US (85-265 Vac)

SO8 8W 5W

DIP8 13W 8W

Typical Application Circuit

4/F, Building F, IT industry Park

No.21 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

Ver 1.1

http://www.chipown.com.cn

-1-

AP8012
Pin Configuration

Chipown

Pin Definitions
Pin Number 1,2 3 Pin Name GND COMP Pin Function Description Sense FET source terminal on primary side and internal control ground. Feedback input defines the peak drain MOSFET current. Positive supply voltage input. Although connected to an auxiliary transformer winding, current is supplied from SW via an internal 4 VCC switch during startup (see Internal Block Diagram section). It is not until VCC reaches them UVLO upper threshold (14.5V) that the internal start-up switch opens and device power is supplied via the auxiliary transformer winding. 5,6,7,8 SW The SW pin is designed to connect directly to the primary lead of the transformer and is capable of switching a maximum of 700V.

Internal Block Diagram
VCC STARTUP SOURCE SW

OTP + UVLO CONTROL + OVP DETECT LEB R1 R2 R3 R4

STARTUP CONIROL PWMLATCHER FF S OSCILITOR + Q OUTPUT DRIVER M1 M2

REFERENCE PREREGULATOR R1 BLAS R2

4/F, Building F, IT industry Park

No.21 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

COMP
Ver 1.1 http://www.chipown.com.cn

GND

-2-

AP8012
Absolute Maximum Ratings
(Ta=25°C, unless otherwise specified) Symbol VSW ID VCC ICOMP VESDMM VESDHBM Tj Tc Tstg Parameter SW to GND Voltage (Tj=25-125°C) Continuous VDMOS Drain Current Supply Voltage Feedback Current Electrostatic Discharge: Machine Model ((R=0?; C=200pF) Electrostatic Discharge: HBM Junction Operating Temperature Case Operating Temperature Storage Temperature

Chipown
Value -0.3 ... 730 Internally limited 0...50 3 200 2000 Internally limited -40 to 150 -55 to 150 Unit V A V mA V V °C °C °C

Electrical Characteristic (Power)
Symbol BVDSS IDSS RDSON Tr Tf COSS Parameter VDMOS Breakdown Voltage Zero Gate Voltage Drain Current Static Drain-Source on Resistance Rise Time Fall Time VDMOS Drain Capacitance Condition ID=1mA; VCOMP=2V VDS=500V; VCOMP=2V; VGS=10V ID=0.4A; ID=0.1A; VIN=300V ID=0.2A; VIN=300V VDS=25V 27 50 ns 100 40 pF Min. 730 100 30 Typ. Max. Unit V μA ?

4/F, Building F, IT industry Park

No.21 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

Ver 1.1

http://www.chipown.com.cn

-3-

AP8012
Electrical Characteristic (Control)
(Ta=25°C, VCC=18V, unless otherwise specified) Symbol VSTART VSTOP VHYS Parameter VCC Start Threshold Voltage VCC Stop Threshold Voltage VCC Threshold Hysteresis VSTOP≤VCC≤35 V; 0≤Tj≤ 100°C With -25°C ≤ Tj ≤ +85°C Tj=25°C, VCOMP = 0V ID=0mA Condition VCOMP=0V VCOMP=0V

Chipown
Min. 13 7 5.8 Typ. 14.5 8 6.5 Max. 16 9 7.2 Unit V V V

UVLO SECTION

OSCILLATOR SECTION FOSC ΔF/ΔT Initial Accuracy Frequency Temperature Change 54 60 ±5 66 ±10 kHz %

FEEDBACK SECTION ICOMP RCOMP GID ILIM TD TB TONMIN TSD THYST VOVP ICH ICHOFF Feedback Shutdown Current COMP Pin Input Impedance ICOMP to ID Current Gain Peak Current Limit Current Sense Delay to Turn-Off Blanking Time Minimum Turn On Time Thermal Shutdown Temperature Thermal Shutdown Hysteresis Over Voltage Protection Startup Charging Current Start Up Charging Current in Thermal Shutdown Operating Supply Current IOP0 (Control Part Only) Switching Operating Supply Current IOP1 (Control Part Only) Not Switching VCOMP = 2V 3 5 mA VCOMP = 0V 4.5 mA VCC=5V; VDS=100V Tj > TSD 0.2 mA 38 140 170 40 42 1 46 Tj = 25°C ID=0.2A 0.32 0.9 1.2 320 0.40 0.48 200 500 700 A ns ns ns °C °C V mA mA k?

CURRENT LIMIT(SELF-PROTECTION)SECTION

PROTECTION SECTION

SUPPLY CURRENT SECTION

4/F, Building F, IT industry Park

No.21 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

Ver 1.1

http://www.chipown.com.cn

-4-

AP8012
Functional Description
1. Startup This device includes a high voltage start up current source connected on the SW of the device. As soon as a voltage is applied on the input of the converter, this start up current source is activated and to charge the VCC capacitor as long as VCC is lower than VSTART. When reaching VSTART, the start up current source is cut off by UVLO&TSD and the device begins to operate by turning on and off its main power MOSFET. As the COMP pin does not receive any current from the opto-coupler, the device operates at full current capacity and the output voltage rises until reaching the regulation point where the secondary loop begins to send a current in the opto-coupler. At this point, the converter enters a regulated operation where the COMP pin receives the amount of current needed to deliver the right power on secondary side. Fig 1 Startup circuit

Chipown
MOSFET delivers a sense current which is proportional to the main current. R2 receives this current and the current coming from the COMP pin. The voltage across R2 VR2 is then compared to a fixed reference voltage. The MOSFET is switched off when VR2 equals the reference voltage. 3. Leading Edge Blanking (LEB) At the instant the internal Sense FET is turned on, there usually exists a high current spike through the Sense FET, caused by the primary side capacitance and secondary side rectifier diode reverse recovery. Excessive voltage across the sense resistor would lead to false feedback operation in the current mode PWM control. To counter this effect, the device employs a leading edge blanking (LEB) circuit. This circuit inhibits the PWM comparator for a short time (typically 500ns) after the Sense FET is turned on. 4. Under Voltage Lock Out Once fault condition occurs, switching is terminated and the Sense FET remains off. This causes VCC to fall. When VCC reaches the UVLO stop voltage, 8V, the protection is reset and the internal high voltage current source charges the VCC capacitor. When VCC reaches the UVLO start voltage, 14.5V, the device resumes its normal operation. In this manner, the auto-restart can alternately enable and disable the switching of the power Sense FET until the fault condition is eliminated. 5. Thermal Shutdown (TSD) The Sense FET and the control IC are integrated in the same chip, making it easier for the control IC to detect the temperature of the Sense FET. When the temperature exceeds approximately 170°C, thermal shutdown is activated, the device turn off the Sense FET and the high voltage current source to charge VCC. The device will go back to work when the lower threshold

2. Feedback A feedback pin controls the operation of the device. Unlike conventional PWM control circuits which use a voltage input, the COMP pin

is sensitive to current. Figure 2 presents the internal current mode structure. The Power
4/F, Building F, IT industry Park

temperature about 140°C is reached.

No.21 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

Ver 1.1

http://www.chipown.com.cn

-5-

AP8012
6. Over Voltage Protection (OVP) In case of malfunction in the secondary side feedback circuit, or feedback loop open caused by a defect of solder, the current through the opto-coupler transistor becomes almost zero. Because excess energy is provided to the output, the output voltage may exceed the rated voltage, resulting in the breakdown of the devices in the

Chipown
secondary side. In order to prevent this situation, an over voltage protection (OVP) circuit is employed. If VCC exceeds 42V, OVP circuit is activated resulting in termination of the switching operation. In order to avoid undesired activation of OVP during normal operation, VCC should be properly designed to be below 42V.

Package Dimensions(DIP8)
Size Min(mm) symbol A A1 A2 A3 A4 A5 B C C1 9.30 1.524 0.39 2.54 0.66TYP 0.99TYP 6.3 7.2 3.3 3.5 6.5 0.53 9.50 Max(min) symbol C2 C3 C4 D D1 D2 Θ1 Θ2 Θ3 0.50 3.3 1.57TYP 8.2 0.2 7.62 8?TYP 8?TYP 5?TYP 8.8 0.35 7.87 Size Min(mm) Max(min)

D2 C4
1 θ

C

C1

C2 C3

2 θ

θ 3

A5

A1

A2

A3

A4

D1

D

A

B

4/F, Building F, IT industry Park

No.21 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

Ver 1.1

http://www.chipown.com.cn

-6-

AP8012

Chipown

IMPORTANT NOTICE
Chipown Microelectronics Co. Ltd. reserves the right to make changes without further notice to any products or specifications herein. Chipown Microelectronics Co. Ltd. does not assume any responsibility for use of any its products for any particular purpose, nor does Chipown Microelectronics Co. Ltd assume any liability arising out of the application or use of any its products or circuits. Chipown Microelectronics Co. Ltd does not convey any license under its patent rights or other rights nor the rights of others.

4/F, Building F, IT industry Park

No.21 Changjiang Road, Wuxi New Destrict Tel: +86(510)8521-7718

Ver 1.1

http://www.chipown.com.cn

-7-


相关文章:
AP8012替换Viper12A应用说明
用VIPER12A或AP8012实现... 14页 免费 VIPER12A 15页 免费 基于VIPer12A的小功率开... 10页 免费 VIPER12A应用电路 3页 1下载券 VIPer12A开关电源芯片...
电源芯片的代换
电源芯片的代换_计算机硬件及网络_IT/计算机_专业...AP8012 VIPer12A AP8022 VIPer22A DAP02 可用 SG...资料上说 STR-S6708 功率小些, 但是我在康佳 P2982...
电源管理芯片代换
电源管理芯片代换_信息与通信_工程科技_专业资料。电源管理芯片代换集成电路型号 ...AP8012 AP8022 DAP02 DAP02ALSZ DAP02ALSZ DAP7A、DP8A DH321、DL321 DM...
液晶常用电源管理芯片
AP8012 VIPer12A AP8022 VIPer22A DAP02 可用 SG...资料上说 STR-S6708 功率小些,但是我在康佳 P...IC⑤脚 18K 改为 12K FSCQ1265RF 系列厚膜开关...
电源管理 集成块代换
电源管理 集成块代换_信息与通信_工程科技_专业资料。电源管理芯片 贴片集成块代换...AP8012 VIPer12A AP8022 VIPer22A DAP02 可用 SG5841 /SG6841 代换 DAP02ALS...
电源IC资料 DL321(DH321)(DVD机)
当②脚电压低于 sv 时,IC1 内部欠压保护电路启动,使电源功率开关管截止,起到...AP8012 VIPer12A AP8022 VIPer22A DAP02 可用 SG5841 /SG6841 代换 DAP02ALS...
DVD机电源IC DL321 及相关资料
7:2.2 欧功率电阻。 8:各种 8 脚电源 IC。或...AP8012 VIPer12A AP8022 VIPer22A DAP02 可用 SG...金正DVD机开关电源原理与... 2页 免费 离线电源IC...
LCDHome论坛_电源模块代换大全
AP8012 VIPer12A AP8022 VIPer22A DAP02 可用 SG...资料上说 STR-S6708 功率小些,但是我在康佳 P...IC⑤脚 18K 改为 12K FSCQ1265RF 系列厚膜开关...
IC牌子
是基于不同功率范围的反激变换开关电源高性能脉冲宽度调制(PWM)控制芯片 IC。OB...(芯朋微):ap8012、ap8022 芯朋微 wisdom: wisdom wff2n60、wff4n60、wff7n60...
更多相关标签:
小功率开关电源芯片 | 大功率开关电源芯片 | 开关电源功率与芯片 | 功率开关芯片 | 大功率电源芯片 | 小功率电源芯片 | 大功率开关电源 | 开关电源芯片 |