ME8320AM6G-N

ME8320-N Primary Side Regulation Controller ME8320-N General Description Features  Easily to Pass Energy Star EPS6.0 Side  Semi-valley Turn on for Higher Efficiency power  ± 5% Constant Current (CC) and ME8320-N is a high performance,highly integrated QR(Quasi Resonant Mode) Regulation(PSR) controller for and Primary offline small converter applications. It has high efficiency and low Voltage (CV) Regulation at Universal AC Input EMI.ME8320-N can meet EPS level 6 energy standard  Less than 60mW standby power easily. The IC also has built-in cable drop compensation  Proprietary cable drop compensation function, which can provide excellent CV performance.  Cycle-by-Cycle current limiting ME8320-N integrates functions and protections of  Built-in Leading Edge Blanking (LEB) Under Voltage Lockout (UVLO),VDD Over Voltage  All Pins Floating Protection Protection(VDD OVP),Output Over Voltage Protection  Built-in Soft Start (Output OVP),Soft Start,Cycle-by-cycle Current Limiting  Output Over Voltage Protection (OCP), All Pins Floating Protection, Gate Clamping,  VDD OVP & Clamp VDD Clamping.  VDD Under Voltage Lockout (UVLO)  Audio Noise Reduction  Available in SOT23-6 package Typical Application Package   Battery chargers for cellular phones, cordless 6-pin SOT23-6 phones, PDA, digital cameras, etc  Replaces linear transformer and RCC SMPS  Small power adapter  AC/DC LED lighting V06 Constant www.microne.com.cn Page 1 of 9 ME8320-N Typical Application Circuit T1 D6 Np C1 Ns R1 R4 C3 D5 R3 C2 Na MOS R2 ME8320-N Rs Figure.1 Typical Application of ME8320-N (5V/1A) V06 www.microne.com.cn Page 2 of 9 ME8320-N Selection Guide ME 83 20 X X G - N New version Environment mark Package M6：SOT23-6 Version or Function:A Product Type Product Series Microne product series product description ME8320AM6G-N Package：SOT23-6 Pin Configuration& Pin Assignment VDD FB CC 6 5 4 1 2 3 GND GATE CS SOT23-6 Pin Assignment Pin Number Symbol 1 GND Ground 2 GATE Totem-pole gate driver output to drive the external MOSFET 3 CS Current sense 4 CC Connect a capacitor between this pin and GND for CC regulation 5 FB 6 VDD V06 Function System feedback pin. This control input regulates both the output voltage in CV mode and output current in CC mode based on the flyback voltage of the auxiliary winding Power Supply www.microne.com.cn Page 3 of 9 ME8320-N Block Diagram VDD Internal supply UVLO Soft gate drive OVP GATE POR LEB A DEM Constant current regulation QR/PSR & logic CS GND Sample FB EA CV Controller (on/off) Vref CC Figure.2 Functional Block Diagram of ME8320-N Absolute Maximum Ratings Parameter Ratings Unit VDD DC supply Voltage 35 V VDD DC clamp current 10 mA GATE pin 20 V CC, CS Voltage range -0.3 ~ 7 V FB Voltage range -0.7 ~ 7 V Storage Temperature range -55~+150 ℃ Maximum Junction Temperature -40~+150 ℃ Operating Ambient Temperature range -40~85 ℃ Lead temperature(Soldering, 10sec.) 260 ℃ ESD capability, HBM(Human body model) 2 KV ESD capability, MM(Machine model) 250 V Thermal resistance (Junction to air) θJA SOT23-6 200 ℃/W Continuous Total Power Dissipation PD SOT23-6 0.63 W Caution: The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. V06 www.microne.com.cn Page 4 of 9 ME8320-N Recommended working condition Parameter Min Typ. Max Unit Power supply voltage, VDD 10 - 30 V Operating Ambient Temperature -40 - 85 ℃ Maximum switching Frequency - 120 - KHz Electrical Characteristics (Test conditions: VDD=16V, TA=25°C unless otherwise stated) Item Testing condition Min Typ. Max Unit - 2 20 VFB=1V, CL=0.5nF VDD=20V - 0.9 1.5 mA VDD Falling 7.8 8.8 9.8 V VDD Rising 19.5 20.5 21.5 32 34 36 V - 39 - V 1.98 2.0 2.02 V Minimum OFF time Tmin_off - 2 - μS Maximum OFF time Tmax_off - 3.2 - mS Max cable compensation current Icable_max - 65 - μA - 500 - nS - 100 - nS 0.98 1 1.02 V Supply Voltage (VDD) Section VDD=UVLO(ON)-1V Measure Start up Current ISTART current into VDD Operating Current IDD VDD Under Voltage Lockout Enter (UVLOOFF) VDD Under Voltage Lockout Exit (Recovery) (UVLOON) VDD Over voltage protection trigger( OVP) VDD Zener clamp voltage (VDD_Clamp) IVDD=7mA μA V Feedback Input Section(FB Pin) Internal Error amplifier(EA) reference input VFB_EA_Ref Current Sense (CS pin) Leading Edge Blanking of CS, LEB Over Current detection and control delay TD_OC CL=1nF at GATE Constant Current Section (CC Pin) Internal CC reference V_CC_REF Gate Drive Output Output low level VOL Io=20mA(sink) - - 1 V Output high level VOH Io=20mA(source) 7.5 - - V Output clamp voltage level VG_Clamp VDD=24V - 14.5 - V Rising Time, TR CL=0.5nF - 700 - nS Falling Time, TF CL=0.5nF - 35 - nS - 150 - °C Temperature Protection V06 www.microne.com.cn Page 5 of 9 ME8320-N Application Information ME8320-N is a high performance, multi mode controlled, highly integrated QR (Quasi Resonant) Primary Side Regulation (PSR) controller. The built-in high precision CV/CC control with high level protection features make it very suitable for offline small power converter applications. ●Start-up current and start-up control Start-up current of ME8320-N is designed to be very low (typically 2μA) so that VDD could be charged up above UVLOON threshold level and device starts up quickly. A large value start-up resistor can therefore be used to minimize the power loss yet reliable start-up in application. ●Operating current The operating current in ME8320-N is as small as 1mA (typical). The small operating current results in higher efficiency and reduces the VDD hold-up capacitance requirement. ●QR/PSR Control ME8320-N uses a proprietary QR/PSR control for high efficiency and low EMI. The IC works in Quasi-Resonant (QR) mode in Constant Current (CC) and Constant Voltage (CV) mode. In this way, the efficiency is boosted and the EMI is reduced greatly. The IC can easily meet EPS level 6 energy standard. ●Constant Current (CC) Regulation ME8320-N can accurately control the output current by the internal current feedback control loop. The output mean current in constant current (CC) mode can be approximately expressed as: ICC (mA) = N 500(mV)  2 Rcs(Ω) In the equation above, N----The turn ratio of primary side winding to secondary side winding. Rcs--- the sensing resistor connected between the MOSFET source to GND. ●Precision CV/CC Performance In ME8320-N the parameters are trimmed to tight range, which makes the system CC/CV to have less than ±5% variation. ●Soft Start ME8320-N features an internal soft start that slowly increases the threshold of cycle-by-cycle current limiting comparator during start-up sequence. It reduces the stress on the secondary diode during start-up. Every start-up process is followed by a soft start activation. V06 www.microne.com.cn Page 6 of 9 ME8320-N ●Proprietary Cable Voltage Compensation in CV Mode When it comes to cellular phone charger applications, the battery is located at the end of cable, which causes typically several percentage of voltage drop on the actual battery voltage. ME8320-N has a proprietary built-in cable voltage drop compensation block which can provide a constant output voltage at the end of the cable over the entire load range in CV mode. ●Leading Edge Blanking (LEB) Each time the power MOSFET is switched on, a turn-on spike occurs across the sensing resistor. To avoid premature termination of the switching pulse, an internal leading edge blanking circuit is built in. During this blanking period (500ns, typical), the cycle-by-cycle current limiting comparator is disabled and cannot switch off the gate driver. Thus, external RC filter with a small time constant is enough for current sensing. ●Minimum and Maximum OFF Time In ME8320-N, a minimum OFF time (typically 2us) is implemented to suppress ringing when GATE is off. The minimum OFF time is necessary in applications where the transformer has a large leakage inductance, particularly at low output voltages or start-up. The maximum OFF time in ME8320-N is typically 3ms, which provides a large range for frequency reduction. In this way, a low standby power of 100mW can be achieved. ●VDD OVP(Over Voltage Protection) VDD OVP (Over Voltage Protection) is implemented in ME8320-N and it is a protection of auto-recovery mode. ●Pin Floating Protection In ME8320-N, if pin floating situation occurs, the IC is designed to have no damage to system. ●Soft Gate Drive ME8320-N has a soft totem-pole gate driver with optimized EMI performance. An internal 16V clamp is added for MOSFET gate protection at higher than expected VDD input. V06 www.microne.com.cn Page 7 of 9 ME8320-N Packaging Information  SOT23-6 DIM Millimeters Inches Min Max Min Max A 1.05 1.45 0.0413 0.0571 A1 0 0.15 0.0000 0.0059 A2 0.9 1.3 0.0354 0.0512 A3 0.55 0.75 0.0217 0.0295 b 0.25 0.5 0.0098 0.0197 c 0.1 0.25 0.0039 0.0098 D 2.7 3.12 0.1063 0.1228 e1 1.9(TYP) 0.0748(TYP) E 2.6 3.1 0.1024 0.1220 E1 1.4 1.8 0.0551 0.0709 e 0.95(TYP) 0.0374(TYP) L 0.25 0.6 0.0098 0.0236 θ 0 8° 0.0000 8° c1 0.2(TYP) V06 0.0079(TYP) www.microne.com.cn Page 8 of 9 ME8320-N  The contents of this document will be updated with the product's improvement without prior notice. Please consult our sales staff before using this document to ensure that you are using  The application circuit examples described in this document are only used to indicate the  Please use this product within the limits stated in this document. We will not be responsible for  The products described in this document are not allowed to be used in equipment or devices that affect the human body without the written permission of our company, including but not limited to: health equipment, medical equipment, disaster prevention equipment, fuel control equipment, automobile equipment, a  Although our company has always been committed to improving product quality and reliability, semiconductor products have a certain probability of malfunction or wrong work. To prevent personal injury or property damage caused by such accidents, please pay full attention to safety design, for example: Alternate design, fire protection design, and prevention of wrong  When exporting this product or this document overseas, you should abide by applicable import  Copying or reprinting part or all of this document in any form without the permission of our company is strictly prohibited. V06 www.microne.com.cn Page 9 of 9