- 您现在的位置：买卖IC网 > PDF目录19872 > FAN6862RTY (Fairchild Semiconductor)IC PWM CTLR GREEN MODE 6-SSOT PDF资料下载
参数资料
| 型号： | FAN6862RTY |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC PWM CTLR GREEN MODE 6-SSOT |
| 标准包装： | 1 |
| 输出隔离： | 隔离 |
| 频率范围： | 62kHz ~ 68kHz |
| 输入电压： | 9.5 V ~ 24 V |
| 功率（瓦特）： | 300mW |
| 工作温度： | -40°C ~ 105°C |
| 封装/外壳： | SOT-23-6 细型，TSOT-23-6 |
| 供应商设备封装： | * |
| 包装： | 标准包装 |
| 其它名称： | FAN6862RTYDKR |
Operation Description
Startup Operation
Frequency
Figure 21 shows a typical startup circuit and transformer
auxiliary winding for a typical application. Before
FAN6862R/L begins switching operation, it consumes
only startup current (typically 8 μ A) and the current
supplied through the startup resistor charges the V DD
capacitor (C DD ). When V DD reaches the turn-on voltage
of 16V (V DD-ON ), FAN6862R/L begins switching and the
current consumed increases to 3mA. Then the power
required is supplied from the transformer auxiliary
winding. The large hysteresis of V DD (8.5V) provides
more holdup time, which allows using a small capacitor
+4.2kHz
65kHz
-4.2kHz
+2.9kHz
22.5kHz
-2.9kHz
PWM
Frequency
for V DD . The startup resistor is typically connected to AC
line for a fast reset of latch protection.
V FB-ZDC V FB -G
V FB -N
V FB
Figure 22. PWM Frequency
Figure 21. Startup Circuit
Green-Mode Operation
The FAN6862R/L uses feedback voltage (V FB ) as an
indicator of the output load and modulates the PWM
frequency, as shown in Figure 22, such that the
switching frequency decreases as load decreases. In
heavy-load conditions, the switching frequency is
65KHz. Once V FB decreases below V FB-N (2.5V), the
PWM frequency starts to linearly decrease from 65KHz
to 22.5kHz to reduce the switching losses. As V FB
decreases below V FB-G (2.1V), the switching frequency is
fixed at 22.5kHz and FAN6862R/L enters “deep” green
mode, where the operating current decreases to 2.5mA
Figure 23. Burst-Mode Operation
Frequency Hopping
EMI reduction is accomplished by frequency hopping,
which spreads the energy over a wider frequency range
than the bandwidth measured by the EMI test
equipment. An internal frequency hopping circuit
changes the switching frequency between 60.8kHz and
69.2kHz with a period of 4.4ms, as shown in Figure 24.
(maximum), further reducing
the standby power
consumption. As V FB decreases below V FB-ZDC (1.7V),
FAN6862R/L enters burst-mode operation. When V FB
drops below V FB-ZDC , switching stops and the output
voltage starts to drop, which causes the feedback
voltage to rise. Once V FB rises above V FB-ZDC , switching
resumes. Burst mode alternately enables and disables
switching, thereby reducing switching loss in standby
mode, as shown in Figure 23.
? 2009 Fairchild Semiconductor Corporation
FAN6862R/L ? Rev. 1.0.1
10
Figure 24. Frequency Hopping
www.fairchildsemi.com
相关PDF资料 |
PDF描述 |
|---|---|
| R2S-243.3/HP | CONV DC/DC 2W 24VIN 3.3VOUT |
| MAX16910CATA9+T | IC REG LDO 3.3V/5V/ADJ .2A 8TDFN |
| RCC60DRAI-S734 | CONN EDGECARD 120PS .100 R/A PCB |
| AP1117K18L-13 | IC REG LDO 1.8V 1A TO263-3L |
| DS9034I-PCX+ | IC SRAM NV TIMEKEEPING POWERCAP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN6862TY | 功能描述:电流型 PWM 控制器 Hi -Integrated Green Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| FAN6862WLTY | 功能描述:电流型 PWM 控制器 Green Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| FAN6862WRTY | 功能描述:电流型 PWM 控制器 Green Mode PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| FAN6862WTY | 功能描述:电流型 PWM 控制器 Low Power Two-Input Logic Gate TinyLogic RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| FAN6863 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:Highly Integrated Green-Mode PWM Controller |
发布紧急采购，3分钟左右您将得到回复。