AP2004

Document overview

  • Manufacturer or author: Diodes Incorporated
  • PDF pages: 9

Technical content

OBSOLETE – PART DISCONTINUED Lead-free

  • PWM Buck Control Circuitry
  • Operating voltage can be up to 27V
  • Under voltage Lockout (UVLO) Protection
  • Short Circuit Protection (SCP)
  • Soft-start circuit
  • Variable Oscillator Frequency -- 300Khz Max
  • 1.25V voltage reference Output
  • 8-pin SOP package
  • SOP-8L: Available in “Green” Molding Compound (No Br, Sb)
  • Lead Free Finish/ RoHS Compliant (Note 1) The AP2004 integrates Pulse- Width-Modulation (PWM) control circuit into a single chip, mainly designs for power -supply regulator. All the functions include an on- chip 1.25V reference output, an error amplifier, an adjustable oscillator, a soft -start, UVLO, SCP circuitry, and a push- pull output circuit. Switching frequency is adjustable by trimming CT. During low VCC situation, the UVLO makes sure that the outputs are off until the internal circuit operates normally.
  • Backlight inverter
  • LCD Monitor
  • CDROM, XDSL Product
  • DC/DC converters in computers, etc. AP 2004 S X - 13 Package PackingLead Free 13 : Tape & Reel G : Green S : SOP-8L L : Lead Free Device Package Code Packaging (Note 2) 13” Tape and Reel Quantity Part Number Suffix AP2004SL-13 S SOP-8L 2500/Tape & Reel -13 AP2004SG-13 S SOP-8L 2500/Tape & Reel -13 Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html . 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. Features General Description

Applications

Ordering Information

AP2004 Rev. 4 - 4 1 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED OUT SSCOMP SCP VCC GND CT FB ( Top View ) SOP-8L Pin Assignments Pin Descriptions Pin Name Description CT Timing Capacitor FB Voltage Feedback SS Soft-Start. COMP Feedback Loop Compensation OUT PWM Output GND Ground VCC Supply Voltage SCP Short Circuit Protection AP2004 Rev. 4 - 4 2 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED Block Diagram Bandgap Reference OUT PWM Amplifier FB VCC SCP CT Error Amplifier COMP UVLO GND 0.7V 1.5V + 2.5V Internal use1.25V Iss VCC Oscillator MAX.300KHz SS Absolute Maximum Ratings Symbol Parameter Rating Unit PD Power dissipation at 25°C 600 mW VCC Supply voltage 28 V VI Amplifier input voltage 20 V VO Collector output voltage VCC-1.0V V ISOURCE Source current 200 mA ISINK Sink current 200 mA TOP Operating junction temperature range -20 to +125 oC TST Storage temperature range -65 to +150 oC Recommended Operating Conditions Symbol Parameter Min Max Unit VCC Supply voltage 3.6 27 V VI Amplifier input voltage 1.05 1.45 V VO Collector output voltage Vcc-1.5 V IFB Current into feedback terminal 45 µA RF Feedback resistor 100 kΩ CT Timing capacitor 100 6800 pF FOSC Oscillator frequency 10 300 KHz AP2004 Rev. 4 - 4 3 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED Electrical Characteristics (TA = 25ºC, VCC = 6V, f = 200 Khz) Reference (REF) Symbol Parameter Conditions Min Typ. Max Unit VREF Comp connect to FB 1.225 1.25 1.275 V Output voltage change with temperature TA = 25ºC ~ 85ºC -0.2 ±1 % Under voltage lockout (UVLO) Symbol Parameter Conditions Min Typ. Max Unit VUT Upper threshold voltage (VCC) IO(REF) = 0.1mA TA = 25ºC 2.9 V VLWT Lower threshold voltage (VCC) 2.4 V VHT Hysteresis (VCC) 500 mV Short-circuit protection (SCP) control Symbol Parameter Conditions Min Typ. Max Unit VIT Input threshold voltage TA = 25ºC 0.60 0.67 0.75 V VSTB Standby voltage No pull up 100 130 160 mV VLT Latched input voltage No pull up 50 100 mV ISCP Input (source) current VI = 0.7V, TA = 25ºC -10 -15 -20 µA VCT Comparator threshold voltage (COMP) 1.5 V Oscillator (OSC) Symbol Parameter Conditions Min Typ. Max Unit FOSC Frequency CT = 270 pF 200 KHz ΔFOSC Standard deviation of frequency CT = 270 pF 10 % Frequency change with voltage VCC = 3.6V ~ 20V 1 Error-amplifier Symbol Parameter Conditions Min Typ. Max Unit VIO Input offset voltage VO (FB) = 1.25V ±6 mV IIO Input offset current VO (FB) = 1.25V ±100 nA IIB Input bias current VO (FB) = 1.25V 160 500 nA VCM Common-mode input voltage range VCC = 3.6V ~ 20V 1.05 1.45 V AV Open-loop voltage amplification RF = 200 kΩ 70 80 dB GBW Unity-gain bandwidth 1.5 MHz CMRR Common-mode rejection ratio 60 80 dB VOH Max. output voltage Vref-0.1 V VOL Min. output voltage 1 V IOI Output (sink) current (COMP) VID = -0.1V, VO = 1.25V 0.5 1.6 mA IOO Output (source) current (COMP) VID = 0.1V, VO = 1.25V -45 -70 µA AP2004 Rev. 4 - 4 4 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED Electrical Characteristics (Continued) (TA = 25ºC, VCC = 6V, f = 200 Khz) Output section Symbol Parameter Conditions Min Typ. Max Unit ILEAK Leakage current VO = 25V 10 µA IDRV Sink current VIN = 20V 200 mA Source current VIN = 20V 200 mA VSAT Output saturation voltage IO = 10 mA 1.0 1.5 V ISC Short-circuit output current VO = 6V 120 mA PWM comparator Symbol Parameter Conditions Min Typ. Max Unit VT0 Input threshold voltage at f = 10 KHz (COMP) CT 0.6 0.7 V VT100 Maximum duty cycle 1.2 1.3 V Total device Symbol Parameter Conditions Min Typ. Max Unit ICCA Average supply current CT = 270pF 6 10 mA Soft Start Symbol Parameter Conditions Min Typ. Max Unit VSS Soft-start Voltage 2.3 V ISS Constant Charge Current 20 µA Typical Application Circuit 22uH Output 5V/5A 10nF Optional Vcc = 12V P mos 4FB 470uF R3 1K~30K AF9435P AF4835P OUT VCC COMP GND SCP SS CT 9K5A 50nF Optional 470uF Step-Down DC/DC converter8 C6 220nF C5 50nF C4 270pF Vout=Vref   + 2 11 R R AP2004 Rev. 4 - 4 5 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED Typical Characteristics REFERENCE OUTPUT VOLTAGE vs. POWER-SUPPLY VOLTAGE 1.22 1.225 1.23 1.235 1.24 1.245 1.25 1.255 1.26 4 8 12 16 20 24 28 Vcc-Power Supply Voltage (V) Vref- Reference Output Voltage (V) AVERAGE SUPPLY CURRENT vs. POWER-SUPPLY VOLTAGE 0 4 8 12 16 20 24 28 Vcc - Power-Supply Voltgae (V) Icc-Average Supply Current (mA) AVERAGE SUPPLY CURRENT vs. AMBIENT TEMPERATURE -50 -25 0 25 50 75 100 TA - Ambient Temperatrure(℃) ICC - Average Supply Current (mA) VCT vs. Frequency 0.2 0.4 0.6 0.8 1.2 1.4 1.6 0 100 200 300 Frequency (KHz) VCT (V) VCT(min) VCT(max) OSCILLATOR FREQUENCY vs. TIMING CAPACITANCE 100 150 200 250 300 350 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5100 5600 6100 6600 CT-Timing Capacitor (pF) fosc - Frequency (KHz) SCP TIME-OUT PERIOD vs. SCP CAPACITANCE 45 90 135 180 225 270 315 360 405 450 495 Cscp - SCP Capacitance (nF) tscp-SCP Time-out Period (ms) AP2004 Rev. 4 - 4 6 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED Typical Characteristics (Continued) SOFT-START TIME (Ts) vs. SOFT-START CAPACITOR (Css) 25 50 75 100 125 150 175 200 Css (nF) Ts (mS) (1) SOP-8L Marking Information AP2004 Rev. 4 - 4 7 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED Package Information (All Dimensions in mm) (1) Package Type: SOP- 8L 1.27typ 0.3/0.5 7°~9° 4.85/4.95 3.85/3.95 5.90/6.10 0.15/0.25 7°~9° 0.62/0.82 0.10/0.20 Gauge Plane 0.254 Seating Plane 0.35max. 45° Detail "A" Detail "A" 1.30/1.50 1.75max. Land Pattern Recommendation (Unit: mm) 6x-1.27 8x-1.55 8x-0.60 5.4 0°/8° AP2004 Rev. 4 - 4 8 of 9 MAY 2019 www.diodes.com © Diodes Incorporated

OBSOLETE – PART DISCONTINUED IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorpo rated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of th is document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all t he companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney f ees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product name s and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorpora ted products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expe cted to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety -related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incor porated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diod es Incorporated products in such safety-critical, life support devices or systems. Copyright © 2019, Diodes Incorporated www.diodes.com AP2004 Rev. 4 - 4 9 of 9 MAY 2019 www.diodes.com © Diodes Incorporated