AP8012 DATASHEET PDF

The AP combines a Pulse Width Modulation. (PWM) controller and a V power MOSFET, specifically designed for a high performance off-line converter. AP Datasheet – PWM Controller – AiT Semiconductor, APP8U datasheet, AP pdf, AP pinout, AP equivalent, data. Product Detail: Offer AP CHIPOWN, APA, APC from Hong Kong Components In Stock Suppliers in 【Price】【Datasheet PDF】USA.

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The diode D7 between capacitor C7 and C4 ensures the proper start-up of the converter. The SW pin is designed to connect directly to the primary lead of the SW transformer and is capable of switching a maximum of V. Zp8012 voltage feedback loop is provided via zener diode D3, resistor R3 and capacitor C6. Depicted output regulation ao8012 overall converter efficiency characteristics measured at different working conditions show good performance of this simple VIPer12AS application in such difficult working environment.

Fig 1 Startup circuit.

The second one with negative output voltage is a buck-boost converter. The circuit is EMI compliant both emission and immunitywhen a small input filter is added. The level of this negative voltage is equal to the output voltage level. The presented results depicted from Figure 18 to Figure 21 show the results. Startup This device includes a ap datasheet voltage start up current source connected on the SW of the device.

It shows the variation of the output voltage with output current at specific DC input voltage. The feedback current can change from 0mA full output power to about 0. By removing the jumper R5 and placement of the jumper R4 the buck converter can be easily changed to the inverting buck-boost converter.

This causes VCC to fall.

Phase N, average detector Figure T c Case Operating Temperature. As the Ap datasheet pin does not receive any current from the opto-coupler, the device operates at full current capacity and ap88012 output voltage rises until reaching the regulation point ap datasheet the secondary loop begins to send a current in the opto-coupler.

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Diode D6 limits the output voltage at light load condition and it also protects the U2 voltage regulator. This device includes a high voltage start up current source connected on the SW of the device. R2 receives this current and the current coming from the COMP pin. T r Rise Ap datasheet.

It is because the output voltage is negative compared to the input voltage referred to the same common ground. The presented reference board incorporates both variants by different assembly options. The first is a buck step-down converter with datashee positive output voltage referenced to the common ground. Exposure to absolute maximum rating conditions for extended periods may affect device ap datasheet. For this reason the reference ground is common for an input and output connection terminal.

Sense FET source terminal on primary side and internal control ground. The output current is the parameter in this case.

AP8012H AP8012C/AP8012 Low Power OFF-Line SMPS Primary Switcher SOP-8

At this point, the converter enters a regulated operation. Assembly top side trough-hole components and solder bottom SMD components side can be seen in Figure 2 and Figure 3.

The R3 voltage variation is 0. The updated every day, always provide the best quality and ap datasheet. Automatic skip cycle mode in low load condition. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use.

In this switch-off phase the source terminal of the VIPer12 sees negative level of forward biased D5 and negative output voltage when referenced to ground. Unlike conventional PWM control circuits which use a. The channel 4 red shows the inductor current.

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Alternatively, a double sided pcb can be used. Channel 4 red shows the inductor current. Figure 24 shows the variation of the output voltage with input DC voltage change.

ap c datasheet & applicatoin notes – Datasheet Archive

In this manner, the auto-restart can alternately enable and disable ap datasheet switching of the power Sense FET until the fault condition is eliminated. No license is granted by implication or otherwise under datasheer patent or patent rights of STMicroelectronics. Auto start up with high voltage current source. Figure 8 depicts the dependency of the efficiency on the input voltage parameter is output current while Figure 9 shows the dependency on the output current parameter is input voltage.

The inductor current then flows through the forward biased D5 diode and charges the output capacitor C3. Fig 1 Startup circuit 2.

APH APC/AP Low Power OFF-Line SMPS Primary Switcher SOP-8

Figure 7 shows the variation of the output voltage with input DC voltage change. Specifications mentioned in this publication are subject to change without notice.

The variable feedback current creates different FB voltage, different voltage drop across the resistor R3 and D3 zener voltage. Ap812 under voltage lockout with hysteresis. For compliance with the EN standard, a small input filter X-capacitor, common mode choke should be added, if there is no EMI filter for the complete system. Once fault condition occurs, switching is terminated and. It is because the feedback current reacts to the output load change to adopt switching duty cycle.