NCP1225 ONSEMI | Alldatasheet

Document overview

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Technical content

Features

  • Current Mode Operation
  • Cycle−By−Cycle Current Limiting
  • High Efficiency Pulse Frequency Modulation (PFM) Control
  • Low Device Operating Current, 0.5 mA Typical
  • No Optocoupler Feedback Control
  • Extremely Low Standby Power
  • Internal Leading Edge Blanking
  • Input Undervoltage Lockout Protection
  • Output Overvoltage Protection
  • Optional Optocoupler Feedback
  • Micro Miniature TSOP−5 Package Typical Applications
  • Low Power Wall Mount Adapters
  • Mobile Phone Adapter Chargers
  • TV/Computer Auxiliary Power Supply This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice. TSOP−5 SN SUFFIX CASE 483 PIN CONNECTIONS Device Package Shipping

ORDERING INFORMATION

TBD TSOP−5 TBD http://onsemi.com TBD = Device Code M = Date Code MARKING DIAGRAM TBD M 3C S VCC 2GND VDRIVE 4 GATE5 (T op View)

1 V +

Figure 1. Simple Block Diagram

http://onsemi.com PIN FUNCTION DESCRIPTION Pin Symbol Description 1 VCC This pin is the supply of the IC. When voltage at this pin is higher than 12 V typical, the operation will be activated. 2 GND This pin is the ground of the primary side of the system. 3 VDRIVE This pin is also used to detect the current status of secondary winding. 4 CS The Current Sense pin senses the voltage developed across the current sensing resistor in series with the power MOSFET. This information is used to terminate the output switch conduction cycle. 5 GATE Controller output to the gate of the power MOSFET. MAXIMUM RATINGS Rating Symbol Value Unit Supply Voltage, VCC VCC −0.3 to 16 V Gate Output Current, Source Current (Note 1) IO_SRC 350 mA Gate Output Current, Sink Current (Note 1) IO_SINK 450 mA Thermal Characteristics TSOP−5 Plastic Package, Case 483 Thermal Resistance, Junction−to−Air R JA 250 °C/W Current Sense, CS Input Voltage VCS −0.3 to 10 V VDRIVE Input Voltage VDRIVE −0.3 to 10 V Gate Voltage VGATE −0.3 to 16 V Operating Junction Temperature TJ −25 to +150 °C Operating Ambient Temperature TA −25 to +105 °C Storage Temperature Range Tstg −65 to 150 °C ESD Capability, HBM Model − 2.0 KV ESD Capability, Machine Model − 200 V 1. Maximum package power dissipation limits must be observed.

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ELECTRICAL CHARACTERISTICS

(For typical values VCC = 13 V, TA = 25°C, and for min/max values TA = −25°C to +105°C, unless otherwise noted.) Characteristic Symbol Min Typ Max Unit CURRENT SENSE COMPARATOR (PIN 4) Current Sense Reset Threshold VCS_RESET 0.95 1.0 1.05 V Current Sense Set Threshold VCS_SET 0.475 0.5 0.525 V Input Bias Current IIB − TBD − A Propagation Delay (Current Sense Input to Output) tPLH − 200 − ns VDRIVE (PIN 3) Vdrive Sense Pin Threshold VDRIVE_SET_TH 0.118 0.125 0.131 V Input Bias Current IVDRIVE_IB − 50 − nA GATE (PIN 5) Output Voltage Rise Time (CL = 1.0 nF, TA = 25°C) tR − 55 − ns Output Voltage Fall Time (CL = 1.0 nF, TA = 25°C) tF − 40 − ns Output Voltage Low State (Isink = 20 mA) (Isink = 100 mA) VOL 0.27 1.5 V High State (Isource = 20 mA) (Isource = 100 mA) VOH − 11.7 V Gate Signal Maximum ON Time TON(MAX) 8.0 10 12 s UNDERVOLTAGE LOCKOUT (PIN 1) Start−Up Threshold (VCC Rising) VTH(ON) 11 12 13 V Minimum Operation Voltage After Turn−On VCC(MIN) 6.5 7.5 8.5 V OVERVOLTAGE PROTECTION (PIN 1) Overvoltage Protect (OVP) Threshold VTH(OVP) 13.5 14.5 15.5 V TOTAL DEVICE Power Supply Current Startup (VCC = 10 V) ISTART − − 60 A Operating Current (No Switch, TA = 25°C) ICC − 0.5 − mA

2 Meg

Figure 2. Typical Application Circuit Without Optocoupler

http://onsemi.com PACKAGE DIMENSIONS TSOP−5 SN SUFFIX CASE 483−02 ISSUE C NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. MAXIMUM LEAD THICKNESS INCLUDES LEAD FINISH THICKNESS. MINIMUM LEAD THICKNESS IS THE MINIMUM THICKNESS OF BASE MATERIAL. DIM MIN MAX MIN MAX INCHESMILLIMETERS A 2.90 3.10 0.1142 0.1220 B 1.30 1.70 0.0512 0.0669 C 0.90 1.10 0.0354 0.0433 D 0.25 0.50 0.0098 0.0197 G 0.85 1.05 0.0335 0.0413 H 0.013 0.100 0.0005 0.0040 J 0.10 0.26 0.0040 0.0102 K 0.20 0.60 0.0079 0.0236 L 1.25 1.55 0.0493 0.0610 M 0 10 0 10 S 2.50 3.00 0.0985 0.1181 0.05 (0.002) 12 3 S A G L B D H C K M J ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION N. American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone : 81−3−5773−3850 NCP1225/D LITERATURE FULFILLMENT : Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone : 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative.