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MFG:Panasonic Package Cooled:DIP
Part Number: AN8038
MFG: Panasonic
Package Cooled: DIP
Description: GND
Pin No.
Symbol
Description
...
- Table of contents:
AN8038
-
Suppliers
DataSheet
General Description
AN8038 General Description
GND
| Pin No. | Symbol | Description |
| 1 | TR | Transformer reset. When a transformer reset is detected, i.e., a low level is input to this pin, the IC output goes high. However, the transformer reset signal is ignored during the minimum off-period determined by the CF pin. The maximum on-period is also corrected according to the current flowing out of this pin. |
| 2 | RSTB | Adjusts the light-load detection level that determines the when the IC switches from RCC to discontinuous operation. When the voltage (VFB) which is I-V conversion of current feedback signal from IFB pin goes up higher than this pin, minimum off-period current at CF pin decreases, and operating frequency decreases. The detection level can be adjusted arbitrarily using an external pull-down resistor. |
| 3 | CF | Connection for the capacitor that determines the on and off periods for the IC output (Out). |
| 4 | IFB | Input for the current feedback signal from the power supply output photocoupler |
| 5 | CLM | Input of the pulse-by-pulse overcurrent protection circuit. Normally, it will be necessary to add an external filter for this input. |
| 6 | GND | Ground |
| 7 | VOUT | Output to drive a power MOSFET directly |
| 8 | VCC | Power supply. This pin watches VCC , and has operating threshold voltages for the start, stop, OVP, and OVP reset levels. |
AN8038 Maximum Ratings
· Supports improved conformance with energy conservation laws by providing two operating modes. With external
resistors, it is possible to set the operatingpoint at which the modes change over according to the load power, as shown below.
1.Continuous (RCC) mode
High efficiency achieved with local resonance operation(zero cross detection).
2.Discontinuous mode(standby) modeReduced switching loss and standby power due to reduced frequency
· Input voltage correction function. This function correctsthe maximum on-period in a manner inversely proportionalto the input voltage.
· Built-in overvoltage protection function (detects at VCC pin)
· Pulse-by-pulse overcurrent protection function (single detection per one cycle)
· Packages: 8-pin DIP ··· AN8038
8-pin SOP ··· AN8038S
resistors, it is possible to set the operatingpoint at which the modes change over according to the load power, as shown below.
1.Continuous (RCC) mode
High efficiency achieved with local resonance operation(zero cross detection).
2.Discontinuous mode(standby) modeReduced switching loss and standby power due to reduced frequency
· Input voltage correction function. This function correctsthe maximum on-period in a manner inversely proportionalto the input voltage.
· Built-in overvoltage protection function (detects at VCC pin)
· Pulse-by-pulse overcurrent protection function (single detection per one cycle)
· Packages: 8-pin DIP ··· AN8038
8-pin SOP ··· AN8038S
AN8038 Features
· Supports improved conformance with energy conservation laws by providing two operating modes. With external
resistors, it is possible to set the operatingpoint at which the modes change over according to the load power, as shown
below.
1.Continuous (RCC) mode
High efficiency achieved with local resonance operation(zero cross detection).
2.Discontinuous mode(standby) modeReduced switching loss and standby power due to reduced frequency
· Input voltage correction function. This function correctsthe maximum on-period in a manner inversely proportionalto the
input voltage.
· Built-in overvoltage protection function (detects at VCC pin)
· Pulse-by-pulse overcurrent protection function (single detection per one cycle)
· Packages: 8-pin DIP ··· AN8038
8-pin SOP ··· AN8038S
resistors, it is possible to set the operatingpoint at which the modes change over according to the load power, as shown
below.
1.Continuous (RCC) mode
High efficiency achieved with local resonance operation(zero cross detection).
2.Discontinuous mode(standby) modeReduced switching loss and standby power due to reduced frequency
· Input voltage correction function. This function correctsthe maximum on-period in a manner inversely proportionalto the
input voltage.
· Built-in overvoltage protection function (detects at VCC pin)
· Pulse-by-pulse overcurrent protection function (single detection per one cycle)
· Packages: 8-pin DIP ··· AN8038
8-pin SOP ··· AN8038S
AN8038
PDF/DataSheet Download
- Datasheet: AN8038
- File Size: 183807 KB
- Manufacturer: PANASONIC [Panasonic Semiconductor]
- Click here to Download
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