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參數資料
| 型號： | SGP400DZ |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback |
| 中文描述： | SWITCHING CONTROLLER, 68 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | LEAD FREE, DIP-8 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 497K |
| 代理商： | SGP400DZ |
Product Specification
Low-Power Green-Mode PWM Flyback Power Controller without Secondary Feedback
FEATURES
Linearly decreasing PWM frequency
Green-mode under light-load and zero-load
conditions
Constant voltage (CV) and constant current (CC)
No secondary feedback
Low start-up current (8μA)
Low operating current (3.6mA)
Leading-edge blanking
Constant power limit
Universal AC input range
Synchronized slope compensation
140
°
C OTP sensor with hysteresis
V
DD
over-voltage clamping
Cycle-by-cycle current limiting
Under-voltage lockout (UVLO)
Fixed PWM frequency with hopping
Gate output maximum voltage clamped at 17V
Small SOT-26 package
APPLICATIONS
Low-power flyback power converters, such as:
Battery chargers for cellular phones, cordless phones,
PDAs, digital cameras, and power tools
Power adapters for ink jet printers, video game
consoles, and portable audio players
Open-frame SMPS for TV/DVD standby and other
auxiliary supplies, home appliances, consumer
electronics, and PC 5V standby-power
Replacements for linear transformers and
RCC SMPS
TYPICAL APPLICATION
SGP400
System General Corp.
Version 1.0.1 (IAO33.0084.B0)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 24, 2007
V
IN
C
IN
R
IN
D
1
W
AUX
C
O
D
O
Q1
V
O
R
S
SENSE
GATE
VDD
GND
DESCRIPTION
This highly integrated PWM controller provides several
features to enhance the performance of low-power
flyback converters. To minimize standby power
consumption, the proprietary green-mode function
provides off-time modulation to linearly decrease the
switching frequency under light-load and zero-load
conditions. This green-mode function enables the power
supply to meet international power conservation
requirements. The supply voltage, V
DD
, is also used for
feedback compensation, to regulate the output voltage
without requiring a conventional TL431 and a
photo-coupler. The typical start-up current is only 8μA,
while the typical operating current can be as low as
3.6mA. A large start-up resistance could be used to
achieve even higher power conversion efficiency.
SGP400 integrates a frequency hopping function, which
helps reduce EMI emission of a power supply with
minimum line filters. Built-in synchronized slope
compensation
maintains
current-mode control. Proprietary internal compensation
ensures constant output power limiting over a universal
range of AC input voltages, from 90V
AC
to 264V
AC
.
Pulse-by-pulse current limiting ensures a constant output
current, even if a short-circuit occurs. Also, the internal
protection circuit disables PWM output if V
DD
exceeds
22.7V. The gate output is clamped at 16.7V to protect the
power MOS from over-voltage damage. The built-in
over temperature protection (OTP) function shuts down
the controller at 140
°
C with a 30
°
C hysteresis. The
SGP400, designed to provide a low-cost total solution for
flyback converters, is available in a small footprint, 6-pin,
SOT-26 package.
the
stability
of
peak
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相關代理商/技術參數 |
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|---|---|
| SGP400TZ | 功能描述:開關變換器、穩壓器與控制器 Low Power Grn Mode PWM Cntrl RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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| SGP40N60UF | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Ultra-Fast IGBT |
| SGP40N60UFTU | 功能描述:IGBT 晶體管 Dis High Perf IGBT RoHS:否 制造商:Fairchild Semiconductor 配置: 集電極—發射極最大電壓 VCEO:650 V 集電極—射極飽和電壓:2.3 V 柵極/發射極最大電壓:20 V 在25 C的連續集電極電流:150 A 柵極—射極漏泄電流:400 nA 功率耗散:187 W 最大工作溫度: 封裝 / 箱體:TO-247 封裝:Tube |
| SGP4-300Q83 | 制造商:Banner Engineering 功能描述:SGP4-300Q83 PAIR 4 BM GRD QD 300mm EZ SCREEN |
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