View NCP1225_324556.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

NCP1225 Product Preview Low Standby Power SMPS Controller
NCP1225 is a low standby power Switch-Mode Power Supply, SMPS controller IC specially designed for low power AC-DC adapter applications. The device operates in Discontinuous Conduction Mode (DCM) with Pulse Frequency Modulation (PFM) control scheme. PFM operation can provide high operating efficiency even at light loading conditions and the device itself takes extremely low operating current. With careful circuit design, low standby power down to 300 mW can be achieved for universal line input low power adapters. This specific feature can help the end products to comply with immediate and future international power saving regulations easily. An innovative feedback compensation scheme is integrated in NCP1225 to eliminate the expensive optocoupler in the feedback path. By only using simple auxiliary winding feedback, the regulator still can achieve good output voltage regulation usually not possible with common SMPS controller ICs without optocoupler. For even better regulation applications, optocoupler feedback can still be used in place. Additionally, value-added features as overvoltage protection, undervoltage lockout and overcurrent protection functions are also included. This controller is an ideal solution for low power adapters and mobile phone chargers. With all valuable features, this device is available in the tiny TSOP-5 package.
Features http://onsemi.com MARKING DIAGRAM
5 5 1 TSOP-5 SN SUFFIX CASE 483 TBD = Device Code M = Date Code TBDM 1
PIN CONNECTIONS
VCC GND VDRIVE 1 2 3 (Top View) 4 CS 5 GATE
* * * * * * * * * * *
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
ORDERING INFORMATION
Device TBD Package TSOP-5 Shipping TBD
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.
(c) Semiconductor Components Industries, LLC, 2003
1
November, 2003 - Rev. P0
Publication Order Number: NCP1225/D
NCP1225
- + + 0.125 V - VCC + - + - 7.5/12 V Reference VDRIVE
S
Q
AND
GATE
- + + 1V - 0.5 V GND + - + -
R
Q OR
TON MAX
LEB
CS
Figure 1. Simple Block Diagram
http://onsemi.com
2
NCP1225
PIN FUNCTION DESCRIPTION
Pin 1 2 3 4 5 Symbol VCC GND VDRIVE CS GATE Description This pin is the supply of the IC. When voltage at this pin is higher than 12 V typical, the operation will be activated. This pin is the ground of the primary side of the system. This pin is also used to detect the current status of secondary winding. 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. Controller output to the gate of the power MOSFET.
MAXIMUM RATINGS
Rating Supply Voltage, VCC Gate Output Current, Source Current (Note 1) Gate Output Current, Sink Current (Note 1) Thermal Characteristics TSOP-5 Plastic Package, Case 483 Thermal Resistance, Junction-to-Air Current Sense, CS Input Voltage VDRIVE Input Voltage Gate Voltage Operating Junction Temperature Operating Ambient Temperature Storage Temperature Range ESD Capability, HBM Model ESD Capability, Machine Model 1. Maximum package power dissipation limits must be observed. Symbol VCC IO_SRC IO_SINK RqJA Value -0.3 to 16 350 450 250 Unit V mA mA C/W
VCS VDRIVE VGATE TJ TA Tstg - -
-0.3 to 10 -0.3 to 10 -0.3 to 16 -25 to +150 -25 to +105 -65 to 150 2.0 200
V V V C C C KV V
http://onsemi.com
3
NCP1225
ELECTRICAL CHARACTERISTICS
(For typical values VCC = 13 V, TA = 25C, and for min/max values TA = -25C to +105C, unless otherwise noted.) Characteristic CURRENT SENSE COMPARATOR (PIN 4) Current Sense Reset Threshold Current Sense Set Threshold Input Bias Current Propagation Delay (Current Sense Input to Output) VDRIVE (PIN 3) Vdrive Sense Pin Threshold Input Bias Current GATE (PIN 5) Output Voltage Rise Time (CL = 1.0 nF, TA = 25C) Output Voltage Fall Time (CL = 1.0 nF, TA = 25C) Output Voltage Low State (Isink = 20 mA) (Isink = 100 mA) High State (Isource = 20 mA) (Isource = 100 mA) Gate Signal Maximum ON Time UNDERVOLTAGE LOCKOUT (PIN 1) Start-Up Threshold (VCC Rising) Minimum Operation Voltage After Turn-On OVERVOLTAGE PROTECTION (PIN 1) Overvoltage Protect (OVP) Threshold TOTAL DEVICE Power Supply Current Startup (VCC = 10 V) Operating Current (No Switch, TA = 25C) ISTART ICC - - - 0.5 60 - mA mA VTH(OVP) 13.5 14.5 15.5 V VTH(ON) VCC(MIN) 11 6.5 12 7.5 13 8.5 V V tR tF VOL - - VOH TON(MAX) - - 8.0 0.27 1.5 11.7 10 10 - - - - 12 V ms - - 55 40 - - ns ns V VDRIVE_SET_TH IVDRIVE_IB 0.118 - 0.125 50 0.131 - V nA VCS_RESET VCS_SET IIB tPLH 0.95 0.475 - - 1.0 0.5 TBD 200 1.05 0.525 - - V V mA ns Symbol Min Typ Max Unit
http://onsemi.com
4
NCP1225
MUR1100
470 mF 4.7 mF 100 K 1N4007 47 n VCC 90 X 264 Vac 4.7 mF x 2 GND VDRIVE 4.7 mF 200 K 3 1 2 3 NCP1225 5 GATE 1N60E
500
2 Meg
200 K
4
CS
Figure 2. Typical Application Circuit Without Optocoupler
http://onsemi.com
5
NCP1225
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 A B C D G H J K L M S MILLIMETERS MIN MAX 2.90 3.10 1.30 1.70 0.90 1.10 0.25 0.50 0.85 1.05 0.013 0.100 0.10 0.26 0.20 0.60 1.25 1.55 0_ 10 _ 2.50 3.00 INCHES MIN MAX 0.1142 0.1220 0.0512 0.0669 0.0354 0.0433 0.0098 0.0197 0.0335 0.0413 0.0005 0.0040 0.0040 0.0102 0.0079 0.0236 0.0493 0.0610 0_ 10 _ 0.0985 0.1181
D
5 1 2 4 3
S
B
L G A J C 0.05 (0.002) H K M
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
LITERATURE FULFILLMENT: N. American Technical Support: 800-282-9855 Toll Free Literature Distribution Center for ON Semiconductor USA/Canada P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2-9-1 Kamimeguro, Meguro-ku, Tokyo, Japan 153-0051 Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Phone: 81-3-5773-3850 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.
http://onsemi.com
6
NCP1225/D

▲Up To Search▲

Price & Availability of NCP1225

	To Download NCP1225 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .