參數(shù)資料
型號(hào)： SGP100SZ
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： Primary-side-control PWM Controller
中文描述： SWITCHING CONTROLLER, 45 kHz SWITCHING FREQ-MAX, PDSO8
封裝： LEAD FREE, SOP-8
文件頁(yè)數(shù)： 1/14頁(yè)
文件大?。?/td> 501K
代理商： SGP100SZ
Product Specification
Primary-side-control PWM Controller
SGP100
System General Corp.
Version 1.1.1 (IAO33.0042.B1)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 26, 2007
FEATURES
Constant-voltage (CV) and constant-current (CC)
control without secondary-feedback circuitry
Green-mode function: PWM frequency linearly
decreasing
Fixed PWM frequency at 42kHz with frequency
hopping to solve EMI problems
Low start-up current: 10
μ
A (typical)
Low operating current: 6.5mA (typical)
Peak-current-mode control in CV mode
Cycle-by-cycle current limiting
V
DD
over-voltage protection with latch (OVP)
V
DD
under-voltage lockout (UVLO)
Gate output maximum voltage clamped at 18V
Fixed over-temperature protection with latch
APPLICATIONS
Battery chargers for cellular phones, cordless phones,
PDA, digital cameras, and power tools
Replacement for linear transformer and RCC SMPS
DESCRIPTION
This highly integrated PWM controller provides several
features to enhance the performance of low-power
flyback converters. The patented topology of SGP100
enables simplified circuit design for battery charger
applications. The result is a low-cost, smaller and lighter
charger than a conventional design or a linear transformer.
To minimize the standby power consumption, the
proprietary green-mode function provides off-time
modulation to linearly decrease PWM frequency under
light-load conditions. This green-mode function allows
the power supply to meet power conservation
requirements. The start-up current is only 10μA, which
allows large start-up resistance for further power saving.
A charger can be implemented with few external
components and minimal cost. A typical output CV/CC
characteristic envelope is shown in Figure 1.
Vo(V)
Io(mA)
+/- 10%
+/- 10%
Figure 1. Typical Output V-I Characteristic
TYPICAL APPLICATION
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