AP3108L HIGH-PERFORMANCE GREEN MODE PWM CONTROLLER Description Pin Assignments The AP3108L is a Current Mode PWM controller specially designed for offline power supply that requires ultra-low standby power, high- (Top View) power density and comprehensive protection. The AP3108L coordinating with Diodes secondary side controller, such as the AP4320, can be applied in the situation that requires for constant CC and constant CV. The maximum switching frequency of the AP3108L is set at 65kHZ. The switching frequency can be modulated through green mode, in which it will smoothly decrease along with the decreasing load. This will cause the minimum switching frequency to be clamped at about 22kHz to avoid audible noise. The AP3108L provides an inner high-voltage start-up function through HV pin which can save the use of the external start-up resistor, reducing the standby loss. The HV pin also realizes X-CAP discharge function. This is a useful function for power saving when an X-CAP is SSOP-9 (Type CJ) connected to a system, for it will discharge the X-CAP when the AC line voltage is off automatically without the need for extra discharge resistors. The AP3108L integrates a VCC LDO circuitry, allowing the LDO to regulate the wide range V , which is rectified from auxiliary CC IN winding to an acceptable value. This makes the AP3108L a good Applications choice in wide range output voltage application. Switching AC-DC Adapter/Charger There are also versatile system protections provided by AP3108L, Open Frame Switching Power Supply such as secondary side OVP, secondary side UVP, constant output current limit, cycle-by-cycle current limit, brown-out protection, programmable external OTP, etc. Features Current Mode Control High-Voltage Startup Embedded VCC LDO to Guarantee Wide Range Output Voltage Constant, Low Output Current in Output Short Situation Low VCC Charge Current Reduces Standby Power in Output Short Situation Non-Audible-Noise Green-Mode Control Internal Slope Compensation Soft Start During Startup Process Frequency Fold Back for High Average Efficiency Constant Over Current Protection(COCP) VCC Maintain Mode X-CAP Discharge Function Precise Secondary Side OVP and UVP Programmable External OTP Brown-Out Protection Overload Protection FOCP and SSCP Protection Useful Pin Fault Protection SSOP-9 (Type CJ) is Available Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See AP3108L Typical Applications Circuit F1 L1 CY1 T 1 D 1 D4 C1 C2 C3 R2 CX D10 L2 USB1 AC Vo C8 D 2 D 3 R1 R13 NTC1 D5 C9 C10 C11 D8 D9 D6 R15 GND R16 C4 R3 R4 C13 D7 R20 R5 R6 Q1 R21 3 R7 R8 4 DEM 6 GATE VCC-IN R14 C14 U1 R17 9 HV R9 AP3108L 8 SENSE U3 1 R10 CTRL R12 R11 C5 C17 1 6 Vsense VCC 7 2 FB VCC C16 RT AP4320 GND C15 4 2 5 U2 Ictrl GND R28 R18 C7 C6 5 3 Vout Vctrl R19 C18 Pin Descriptions Pin Name Function 1 CTRL Programmable external protection 2 FB Feedback. Directly connected to the opto-coupler 3 DEM Sample V to realize SOVP and SUVP protection OUT 4 VCC IN Wide range input supply voltage to produce V CC 5 GND Signal ground 6 GATE Gate driver output 7 VCC Supply voltage of driver and control circuits 8 SENSE Sense the primary current 9 HV High Voltage Input. Sense line voltage and provide startup current to V CC 2 of 16 AP3108L December 2018 Diodes Incorporated www.diodes.com Document number: DS38697 Rev. 5 - 2