AX3075J10A

AX3075/B Wide Input Range CC/CV Step Down Controller  GENERAL DESCRIPTION The AX3075/B is a step down PWM controller with a driving dual output current to 3.4A. It is designed to allow for operating a wide supply voltage range from 9V to 40V. The external shutdown function can be controlled by logic level to pull COMP pin down, and then comes into standby mode. The external compensation makes feedback control have good line and load regulation with flexible external design. The AX3075/B operates in the CC (Constant output Current) mode or CV (Constant output Voltage) mode, and the OCP current value is set by current sensing resisters. The AX3075/B is suitable for the DC/DC switching power applications when requested the current limit function. The devices are available in TDFN-10L packages and require very few external devices for operation.  FEATURES - VIN Operate with 9V ~ 40V Supply Voltage VOUT Accuracy (VREF =1.0V) ±2.0% Dual-Channeling CC/CV Mode Control External Current Limit Setting for 2 channel Over Temperature Protection Internal Soft Start ~ 3ms Fixed Frequency 120KHz/65KHz UVLO Protection (min=7V, typ=7.5V, max=8V) Duty Cycle Range AX3075 (0~93%) AX3075B (0~97%) Single Pin to External Compensation and Shutdown Control COUT MLCC support. Built in Adjustable Line-Compensation TDFN-10L Package -  APPLICATION - Car Charger High-Brightness Lighting Portable Charger Devices General-Purpose DC/DC Controller with Current Limit 1/14 Axelite Confidential Materials, do not copy or distribute without written consent. Rev1.2 Apr.22, 2016 AX3075/B  BLOCK DIAGRAM Over Temperature Protection POR VIN Internal Regulator 5V 5V FB 0.36V + Fault Logics UVP BS VREF 0.4V + + UG - ERROR AMPLIFIER + COMP Cable COMP SEN1 0.1V SEN2 0.1V Current Sensor1 Gate Control LX ramp Current Sensor2 Oscillator 120KHz/65KHz LG Zero Current Detection GND  PIN ASSIGNMENT The package of AX3075/B is TDFN-10L the pin assignment is given by: VIN 1 10 COMP 2 FB 3 Exposed Pad SEN2 4 (GND) LX 8 UG 7 LG 9 6 SEN1 5 BS GND TDFN-10L (3*3) TOP View 2/14 Axelite Confidential Materials, do not copy or distribute without written consent. Rev1.2 Apr.22, 2016 AX3075/B Name VIN COMP FB SEN2 SEN1 GND LG UG LX BS Description Power Supply Input. Bypass this pin with a 1uF ceramic capacitor to GND, placed as close to the IC as possible. Error Amplifier Output. This is the output of the error amplifier (EA) and the non-inverting input of the PWM comparator. Use this pin in combination with the FB pin to compensate the voltage control feedback loop of the converter. Pulling COMP to a level below 0.4V nominal disables the controller, causes the oscillator to stop, and makes the UGATE and LGATE outputs held low. Feedback Pin. The voltage at this pin is regulated to 1.0V. Connect to the resistor divider between output and GND to set the output voltage. The Current Sense Input2 (+) Pin. When the SEN2 is larger than the current sense voltage, OCP function will enable. The Current Sense Input1 (+) Pin. When the SEN1 is larger than the current sense voltage, OCP function will enable. Ground. Connect this pin to a large PCB copper area for best heat dissipation, Return FB, and COMP to this GND and connect this GND to power GND at a single point for best noise immunity. Output to Low-side Gate Driver. Output to High-side Gate Driver. Power Switching Output to External Inductor. Bootstrap Pin. This provides power to the internal higher MOSFET gate driver. Connect a 100nF capacitor from BS pin to LX pin.  ORDER/MARKING INFORMATION Order Information AX3075 X XXX X Blank:120KHz Package Type Packing B:65KHz J10: TDFN-10L Blank : Tube A : Taping Top Marking 3 0 75X Y Y W WX Part number AX3075 AX3075B ID code: internal WW: 01~52 Year: 10=2010 11=2011 : : 19=2019 3/14 Axelite Confidential Materials, do not copy or distribute without written consent. Rev1.2 Apr.22, 2016 AX3075/B  ABSOLUTE MAXIMUM RATINGS (at TA = 25°C) Characteristics Symbol Supply Input Voltage VIN BS to LX LX to GND VSW BS, UG to GND FB, COMP, LG,SEN1, SEN2 to GND ESD HBM (Human Body Mode) ESD MM (Machine Mode) Power Dissipation, PD @TA=25°C PD Thermal Resistance from Junction to case θJC Thermal Resistance from Junction to ambient θJA Rating -0.3 to +43 -0.3 to +7 -1 to +VIN+1 VSW-0.3 to VSW+7 0.3 to +7 ±2K ±200 ( TJ-TA ) / θJA 7.8 68  RECOMMENDED OPERATION CONDITIONS Characteristics Symbol Storage Temperature Range TST Junction Temperature TJ Operating Temperature TOP Temperature Range(Soldering 10sec) Rating -65 to +150 -40 to +125 -40 to +85 260 Unit V V V V V V V mW °C/W °C/W Unit °C °C °C °C 4/14 Axelite Confidential Materials, do not copy or distribute without written consent. Rev1.2 Apr.22, 2016 AX3075/B  ELECTRICAL CHARACTERISTICS VCC=12V, TA=25°C (unless otherwise specified.) Characteristics Symbol Test Conditions Min Typ Max Units Supply Voltage Range VIN VCC 9 - 40 V ICCQ COMP/EN=GND 2 mA ICC 12VIN VOUT=5V,No load - 3.5 mA AX3075 Supply Input Current ICC 30VIN VOUT=5V,No load 4 mA ICC 12VIN VOUT=5V,No load - 4.5 mA AX3075B ICC 30VIN VOUT=5V,No load 5 mA Power-On-Reset VCCRTH VCC Rising. 7 7.5 8 VCC POR Threshold V VCCFTH VCC Falling. - 6.5 Oscillator AX3075 96 120 144 KHz Normal PWM Frequency FOSC IOUT=200mA AX3075B 50 65 80 KHz Minimum On-Time TON-MIN - 200 nS AX3075 0 - 93 % Duty Cycle Range Duty AX3075B 0 - 97 % Reference VREF - 1.0 V Reference Voltage -2 - +2 % Reference Voltage Tolerance Line compensation Current IFB VSEN1 or VSEN2 =100mV 5 uA PWM Error Amplifier - 0.4 V COMP Shutdown Threshold Voltage VCOMP=VCOMP_H -1V - 132 uA COMP Source Current VCOMP=1V - 126 uA COMP Sink Current Current Sense Amplifier Difference Voltage between SEN△VSEN 95 100 105 mV and SEN+ Pre-Driver (Ensured by design) source - 12 Ω UG Driver sink 3 Ω source - 15 Ω LG Driver sink 2 Ω UG low to LG high - 40 nS Dead Time LG low to UG high - 100 nS Protection - 160 °C Over Temperature Shutdown - 40 °C Over Temperature Hysteresis Soft Start TSS 3 ms Soft Start Time - 0.5 s Recycle Time Output Short Circuit Protect Section VSCP - 0.4 V Short Circuit Fold Back Voltage 5/14 Axelite Confidential Materials, do not copy or distribute without written consent. Rev1.2 Apr.22, 2016 AX3075/B Note 1: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability. Note 2: Devices are ESD sensitive. Handling precaution recommended. Note 3: θJA is measured in the natural convection at TA = 25°C on a high effective thermal conductivity test board of JEDEC 51-7 thermal measurement standard.  TYPICAL APPLICATION CIRCUIT VIN=10V~40V INPUT R7 IN BS 10R C1 C8 100uF C4 4.7uF~10uF R4 UG 0R~10R 4.7uF~10uF LX AX3075 LG COMP C2 OUTPUT L1 AMN4008 33uH-66uH R6 Q2 R2 4.7R C7 AMN4008 12K 2.2nF C3 GND 2.2nF C5 C6 1nF 470uF R3 FB 47K 15pF Q1 R8 10R R5 0R~4.7R R1 C9 0.1uF 3K SEN1 SEN2 SEN1 RS1 SEN2 RS2 Note: If output only 1 port,the other Sense pin need connect with GND.  MLCC OUTPUT CAPACITOR APPLICATION VIN=10V~40V INPUT R7 IN BS 10R C1 100uF C8 UG LX AX3075 1nF FB 1K 10nF LG R8 10R R5 0R~4.7R R1 C3 R4 C9 0.1uF 4.7uF~10uF Q1 AMN4008 GND SEN1 SEN2 OUTPUT L1 0R~10R 4.7uF~ 10uF COMP C2 C4 33uH-66uH Q2 AMN4008 R6 4.7R C7 2.2nF R2 12K R3 C5 C6 C9 1nF 100uF MLCC 100uF MLCC RS1 RS2 3K SEN1 SEN2 6/14 Axelite Confidential Materials, do not copy or distribute without written consent. Rev1.2 Apr.22, 2016 AX3075/B  MOSFET SUGGESTION AMN4008 for 3A AMS4210 for 3.4A  Type C application & others  2.4A+1A or 3.4A AMN4008 AMS4210  FUNCTION DESCRIPTIONS CC/CV Mode Control The AX3075/B provides CC/CV function. The Constant output Current control Mode and Constant output Voltage control Mode. Over Current Protection The AX3075/B provides over current protection. A drop voltage on the current sensing resister is over the OCP value, the OCP function will shut down the controller. Soft Start The AX3075/B has internal soft start function to control rise rate of the output voltage and limits the large inrush current at start up. The typical soft start interval is about 3mS. Power on Reset A power-on reset circuit monitors the input voltage. When the input voltage exceeds 7.5V, the converter will start operation. Once input voltage falls below 6.5V, the controller will shut down. Over Temperature Protection The AX3075/B provides over temperature protection. The OTP will shut down the converter when junction temperature exceeds 160°C. Once the junction temperature cools down by approximately 40°C, the converter will resume normal operation. 7/14 Axelite Confidential Materials, do not copy or distribute without written consent. Rev1.2 Apr.22, 2016 AX3075/B Current Limit Protection The Current limit is set by outside resistance (RSENSE), When the SEN1 or SEN2 voltage larger than 100mV, the current limit is happened that driver can be turned off. The current limit set according to the following equation: 100mV Current Limit (A) = R SENSE Output Short-Circuit Protection The AX3075/B provides output short-circuit protection function. When VOUT is short (VFB