NCP1271P100G ON Semiconductor, NCP1271P100G Datasheet
NCP1271P100G
Specifications of NCP1271P100G
Available stocks
Related parts for NCP1271P100G
NCP1271P100G Summary of contents
Page 1
... Offline Battery Chargers • Consumer Electronic Appliances STB, DVD, DVDR *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. © Semiconductor Components Industries, LLC, 2009 September, 2009 − Rev. 6 http://onsemi.com SOIC− ...
Page 2
AC EMI Input Filter latch input* Optional * R skip skip/latch Vcc Gnd Drv * NCP1271 R ramp Figure 1. Typical Application Circuit http://onsemi.com 2 + Output Voltage − ...
Page 3
MAXIMUM RATINGS (Notes 1 and 2) Rating V Pin (Pin 6) CC Maximum Voltage Range Maximum Current Skip/Latch, FB, CS Pin (Pins 1−3) Maximum Voltage Range Maximum Current Drv Pin (Pin 5) Maximum Voltage Range Maximum Current HV Pin (Pin ...
Page 4
I skip Skip/ latch 1 R 10V skip V V 4.8 V 16. 75.3k 10V 180 ns 3 LEB 10V R ramp Gnd PIN ...
Page 5
ELECTRICAL CHARACTERISTICS HV = open, skip = open Ground, DRV = 1 nF, unless otherwise noted.) Characteristic OSCILLATOR Oscillation Frequency (65 kHz Version, T Oscillation Frequency (65 kHz Version, T Oscillation Frequency (65 kHz ...
Page 6
ELECTRICAL CHARACTERISTICS open, skip = open Ground, DRV = 1 nF, unless otherwise noted.) CC Characteristic STARTUP CURRENT SOURCE High−Voltage Current Source Inhibit Voltage (I = 200 mA, ...
Page 7
−50 − TEMPERATURE (°C) Figure 5. Output Gate Drive Resistance vs. Temperature −50 −25 0 ...
Page 8
TEMPERATURE (°C) Figure 11. Skip Level Reset Threshold vs. Temperature 8.5 8.4 8.3 8.2 8.1 8.0 7.9 7.8 7.7 7.6 7.5 −50 − TEMPERATURE (°C) Figure ...
Page 9
− 0 CC(on) 4.4 4.3 4.2 4.1 4.0 3.9 3.8 3.7 3.6 3.5 −50 − TEMPERATURE (°C) Figure 17. High Voltage Startup Current vs. Temperature ...
Page 10
... Introduction The NCP1271 represents a new generation of the fixed−frequency PWM current−mode flyback controllers from ON Semiconductor. The device features integrated high−voltage startup and excellent standby performance. The proprietary Soft−Skip Mode achieves extremely low−standby power consumption while keeping power supply acoustic noise to a minimum ...
Page 11
If not, then the process is repeated. 4. Latched Shutdown – When the Skip/latch pin (Pin 1) voltage is pulled above 8.0 V for more than 13 ms, the NCP1271 goes ...
Page 12
After the second cycle, the controller tries to restart the application. If the restart is not successful, then the process is repeated. During this mode, V never drops below the 4 V latch CC ...
Page 13
Soft−Start Operation Figures 28 and 29 show how the soft−start feature is included in the pulse−width modulation comparator. When the NCP1271 starts up, a soft−start voltage V begins increases gradually from ...
Page 14
Ramp Compensation Ramp compensation is a known mean to cure subharmonic oscillations. These oscillations take place at half the switching frequency and occur only during continuous conduction mode (CCM) with a duty−cycle greater than 50%. To lower the current loop ...
Page 15
Besides the timer−based fault detection, the NCP1271 also enters fault condition when V CC (9.1 V typical). The device will again enter a double hiccup mode and try to restart the application. Operation in Standby Condition During standby operation, or ...
Page 16
Recover from Standby In the event that a large load is encountered during skip cycle operation, the circuit automatically disables the normal Soft−Skip procedure and delivers maximum power to the load (Figure 37). This feature, the Transient Load Detector (TLD), ...
Page 17
V FB Fault operation when staying in this region longer than 130 PWM operation V skip Non−latched shutdown 0 V Figure 40. NCP1271 Operation Threshold OFF opto coupler Figure 41. Non−Latchoff Shutdown Output Drive The output stage ...
Page 18
D1 − D4 Fuse 2A 1N5406 265 Vac T1 E3506−A IC1 NCP1271A Flyback transformer : Cooper CTX22−17179 Lp = 180uH, leakage 2.5uH max naux = Hi−pot 3600Vac ...
Page 19
... ORDERING INFORMATION Device NCP1271D65R2G NCP1271D100R2G NCP1271P65G NCP1271P100G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Frequency Package 65 kHz SOIC−7 (Pb−Free) 100 kHz SOIC−7 (Pb−Free) 65 kHz PDIP− ...
Page 20
NOTE 2 C −T− N SEATING PLANE 0.13 (0.005 PACKAGE DIMENSIONS 7−LEAD PDIP P SUFFIX CASE 626B−01 ISSUE http://onsemi.com ...
Page 21
... 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: 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− ...