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| 型号： | SG6846CLDZ |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR PWM PROG GREEN OTP 8DIP |
| 产品变化通告： | Product Discontinuation 03/Dec/2009 |
| 标准包装： | 59 |
| 输出隔离： | 隔离 |
| 频率范围： | 44.8 ~ 136kHz |
| 输入电压： | 10.5 V ~ 25 V |
| 输出电压： | 18V |
| 功率（瓦特）： | 800mW |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-DIP |
| 包装： | 管件 |
May 2008
SG6846C
Highly Integrated Green-Mode PWM Controller
Features
Low Start-up Current: 8μA
Low Operating Current: 3.7mA
Peak-current Mode Operation with Cycle-by-cycle
Current Limiting
PWM Frequency Continuously Decreasing with
Burst Mode at Light Loads
V DD Over-Voltage Protection (OVP)
AC Input Brownout Protection with Hysteresis
Constant Output Power Limit (Full AC Input Range)
Internal Latch Circuit for OVP, OTP, and OCP
Two-level OCP Delay: 110ms
Programmable PWM Frequency with
Frequency Hopping
OCP Threshold is Half Peak Current Limit
Feedback Open-loop Protection with 110ms Delay
Soft Start-up Time: 5ms
Applications
General-purpose switch mode power supplies and
flyback power converters, including:
Power Adapters
Open-frame SMPS
SMPS with Surge-current Output, such as for
Printers, Scanners, Motor Drivers
Ordering Information
Description
A highly integrated PWM controller, SG6846C provides
several features to enhance the performance of flyback
converters. To minimize standby power consumption, a
proprietary green-mode function provides off-time
modulation to continuously decrease the switching
frequency under light-load conditions. Under zero-load
conditions, the power supply enters burst-mode, which
completely shuts off PWM output. Output restarts just
before the supply voltage drops below the UVLO lower
limit. This green-mode function enables power supplies
to meet international power conservation requirements.
The SG6846C is designed for SMPS with surge-current
output, incorporated with a two-level OCP function.
Besides the cycle-by-cycle current limiting, if the
switching current is higher than OCP threshold and
lasts for 110ms, SG6846C shuts down immediately.
SG6846C also integrates frequency-hopping function
internally, which helps reduce EMI emission of a power
supply with minimum line filters. The built-in
synchronized slope compensation provides proprietary
internal compensation for constant output power limit
over a universal AC input range. The gate output is
clamped at 18V to protect the external MOSFET from
over-voltage damage.
Other protection functions include AC input brownout
protection with hysteresis and V DD over-voltage
protection. For over-temperature protection, an external
NTC thermistor can be applied to sense the ambient
temperature. When OCP, V DD OVP, or OTP are
activated, an internal latch circuit latches off the
controller. The latch resets when V DD supply is removed.
SG6846C is available in 8-pin SOP and DIP packages.
Part Number
SG6846CLSZ
SG6846CLDZ
Operating Temperature Range
-20 to +85°C
-20 to +85°C
OCP Latch
Yes
Yes
Package
8-Pin Small Outline Package (SOP)
8-Pin Dual Inline Package (DIP)
All standard Fairchild Semiconductor products are RoHS compliant and many are also “GREEN” or going green.
For Fairchild’s definition of “green” please visit: http://www.fairchildsemi.com/company/green/rohs_green.html .
? 2007 Fairchild Semiconductor Corporation
SG6846C ? Rev. 1.1.2
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SG6846CLSZ | 功能描述:软开关 PWM 控制器 Highly-Integrated Grn Mode PWM Cntrl RoHS:否 制造商:Fairchild Semiconductor 输出端数量: 输出电流: 开关频率: 工作电源电压:30 V 电源电流: 最大工作温度:+ 105 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| SG6846CS | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Highly-Integrated Green-Mode PWM Controller |
| SG6846CSZ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Highly-Integrated Green-Mode PWM Controller |
| SG6846G | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
| SG6846G_09 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
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