Diodes AP3106 - Manual

Preliminary Datasheet
HIGH VOLTAGE GREEN MODE PWM CONTROLLER AP3106
Sep. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
1
General Description
The AP3106 is a high voltage start-up, current mode
PWM controller with green-mode power-saving
operation.
The PWM switching frequency at normal operation is
externally programmable and trimmed to a narrow
range.
The AP3106 integrates a proprietary internal
frequency dithering function that helps to reduce EMI
emission of a power supply with minimum line filters
used.
To minimize the standby power consumption, a
proprietary adaptive green-mode function is available
to implement frequency modulation under light-load
conditions. To avoid acoustic noise problems, the
minimum PWM frequency is set at about 26kHz.
The AP3106 integrates a lot of functions such as the
Lead-Edge Blanking (LEB) of the current sensing,
internal slope compensation, line compensation, and
several protection features that include
cycle-by-cycle current limit (OCP), over voltage
protection, OTP, OLP and brownout protection.
The AP3106 is available in SOIC-7 package to
realize a compact size.
Features
• High-voltage Start-up Circuit
•
Low Start-up Current: 15
µA (Max.)
• Current Mode Control
• Programmable PWM Switching Frequency
• Non-audible-noise Green Mode Control
• LEB (Leading-Edge Blanking) on SENSE Pin
• Fast OCP for Abnormal Short Circuit
• Frequency Linearly Decreasing at Light Load
• Soft
Driving
• Internal Slope Compensation
• Built-in Brownout Protection
• Useful Pin Fault Protection
CS Pin Floating
RI Pin Short to Ground
RI Pin Floating
• Comprehensive System Protection
VCC Over Voltage Protection (VOVP)
Over Temperature Protection (OTP)
Constant Over Load Protection (COLP)
Short Circuit Protection (SCP)
• Compact Size SOIC-7 Package
Applications
• Switching AC/DC Adaptor
• LCD Monitor/TV Power
• Open Frame Switching Power Supply
Figure 1. Package Type of AP3106
SOIC-7