Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
FAN6751HLMY Datasheet(PDF) 1 Page - Fairchild Semiconductor |
|
FAN6751HLMY Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 13 page www.fairchildsemi.com © 2008 Fairchild Semiconductor Corporation www.fairchildsemi.com Rev. 1.0.0 • 9/26/08 AN-6073 FAN6751 — Highly Integrated Green-Mode PWM Controller Introduction This application note describes a detailed design strategy for a high-efficiency, compact flyback converter. Design considerations and mathematical equations are presented as well as guidelines for a printed circuit board layout. The highly integrated FAN6751 series of PWM controllers provides several features to enhance the performance for LCDM/TV, NB, and adapters. The green-mode function includes off-time modulation and burst mode to reduce the PWM frequency at light-load and in no-load conditions. To avoid acoustic noise problems, the minimum PWM frequency is set above 18KHz. This green- mode function enables the power supply to meet international power conservation requirements. With the internal high-voltage startup circuitry, the power loss due to bleeding resistors is also eliminated. Built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary external line compensation ensures constant output power limit over a wide AC input voltage range, from 90VAC to 264VAC. FAN6751 provides many protection functions, as shown in Table 1. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety should an open-loop or output short-circuit failure occur. Features High-Voltage Startup Low Operating Current: 4mA Linearly Decreasing PWM Frequency to 18KHz Fixed PWM Frequency: 65KHz Peak-Current-Mode Control Cycle-by-Cycle Current Limiting Leading-Edge Blanking (LEB) Synchronized Slope Compensation Internal Open-loop Protection GATE Output Maximum Voltage Clamp: 18V VDD Under-Voltage Lockout (UVLO) VDD Over-Voltage Protection (OVP) Internal Recovery Circuit (OVP, OLP) Internal Sense Short-Circuit Protection External Constant Power Limit (Full AC Input Range) Internal OTP Sensor with Hysteresis Built-in 5ms Soft-Start Function Built-in VIN Pin Pull HIGH (> 4.7V) Recovery Function for Second-Side Output OVP Brownout Protection with Hysteresis Applications General-purpose, switch-mode power supplies and flyback power converters, including: Power Adapters Open-frame SMPS LCD Monitor/TV Figure 1. Pin Configuration (Top View) Table 1. Protection Functions of FAN6751 Series Part Number OVP (VDD) OLP (FB) Pull-High Protection (VIN) OTP (Internal) SCP (SENSE) PWM Frequency FAN6751MRMY Recovery Recovery Recovery Recovery Recovery 65KHz FAN6751HLMY Latch Latch Latch Recovery Recovery 100KHz 1 2 3 4 SOP-8 8 7 6 5 GND FB NC HV GATE VDD SENSE VIN |
Número de pieza similar - FAN6751HLMY |
|
Descripción similar - FAN6751HLMY |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |