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参数资料
| 型号： | TOP223G |
| 厂商： | Power Integrations |
| 文件页数： | 8/20页 |
| 文件大小： | 0K |
| 描述： | IC OFFLINE SWIT PWM OCP HV 8SMD |
| 标准包装： | 50 |
| 系列： | TOPSwitch®-II |
| 输出隔离： | 隔离 |
| 频率范围： | 90kHz ~ 110kHz |
| 输出电压： | 700V |
| 功率（瓦特）： | 25W |
| 工作温度： | -40°C ~ 150°C |
| 封装/外壳： | 8-SMD，鸥翼型 |
| 供应商设备封装： | 8-SMD |
| 包装： | 管件 |
TOP221-227
Key Application Considerations
General Guidelines
? Keep the SOURCE pin length very short. Use a Kelvin
connection to the SOURCE pin for the CONTROL pin
bypass capacitor. Use single point grounding techniques at
the SOURCE pin as shown in Figure 9.
? Minimize peak voltage and ringing on the DRAIN voltage
at turn-off. Use a Zener or TVS Zener diode to clamp the
drain voltage below the breakdown voltage rating of
TOPSwitch under all conditions, including start-up and
overload. The maximum recommended clamp Zener
voltage for the TOP2XX series is 200 V and the
corresponding maximum reflected output voltage on the
primary is 135 V. Please see Step 4: AN-16 in the 1996-97
Data Book and Design Guide or on our Web site.
? The transformer should be designed such that the rate of
change of drain current due to transformer saturation is
within the absolute maximum specification ( ? I D in 100 ns
before turn off as shown in Figure 13). As a guideline, for
most common transformer cores, this can be achieved by
maintaining the Peak Flux Density (at maximum I LIMIT
current) below 4200 Gauss (420 mT). The transformer
spreadsheets Rev. 2.1 (or later) for continuous and Rev.1.0
(or later) for discontinuous conduction mode provide the
? Short interruptions of AC power may cause TOPSwitch to
enter the 8-count auto-restart cycle before starting again.
This is because the input energy storage capacitors are not
completely discharged and the CONTROL pin capacitance
has not discharged below the internal power-up reset
voltage.
? In some cases, minimum loading may be necessary to keep
a lightly loaded or unloaded output voltage within the
desired range due to the minimum ON-time.
Replacing TOPSwitch with TOPSwitch-II
There is no external latching shutdown function in
TOPSwitch-II. Otherwise, the functionality of the
TOPSwitch-II devices is same as that of the TOPSwitch family.
However, before considering TOPSwitch-II as a 'drop in'
replacement in an existing TOPSwitch design, the design
should be verified as described below.
The new TOPSwitch-II family offers more power capability
than the original TOPSwitch family for the same MOSFET
R DS(ON) . Therefore, the original TOPSwitch design must be
reviewed to make sure that the selected TOPSwitch-II
replacement device and other primary components are not over
stressed under abnormal conditions.
necessary information.
The following verification steps are recommended:
? Do not plug TOPSwitch into a “ hot ” IC socket during test.
External CONTROL pin capacitance may be charged to
excessive voltage and cause TOPSwitch damage.
? Check the transformer design to make sure that it meets the
? I D specification as outlined in the General Guidelines
section above.
? While performing TOPSwitch device tests, do not exceed
maximum CONTROL pin voltage of 9 V or maximum
CONTROL pin current of 100 mA.
? Under some conditions, externally provided bias or supply
current driven into the CONTROL pin can hold the
TOPSwitch in one of the 8 auto-restart cycles indefinitely
and prevent starting. To avoid this problem when doing
bench evaluations, it is recommended that the V C power
supply be turned on before the DRAIN voltage is applied.
TOPSwitch can also be reset by shorting the CONTROL
pin to the SOURCE pin momentarily.
? CONTROL pin currents during auto-restart operation are
much lower at low input voltages (< 36 V) which increases
the auto-restart cycle time (see the I C vs. DRAIN Voltage
Characteristic curve).
? Thermal: Higher power capability of the TOPSwitch-II
would in many instances allow use of a smaller MOSFET
device (higher R DS(ON) ) for reduced cost. This may affect
TOPSwitch power dissipation and power supply efficiency.
Therefore thermal performance of the power supply must
be verified with the selected TOPSwitch-II device .
? Clamp Voltage: Reflected and Clamp voltages should be
verified not to exceed recommended maximums for the
TOP2XX Series: 135 V Reflected/200 V Clamp. Please
see Step 4: AN-16 in the Data Book and Design Guide and
readme.txt file attached to the transformer design
spreadsheets.
? Agency Approval: Migrating to TOPSwitch-II may require
agency re-approval.
8
D
7/01
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TOP223GN | 功能描述:交流/直流开关转换器 15W 85-265 VAC 25W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TOP223GN-TL | 功能描述:交流/直流开关转换器 15W 85-265 VAC 25W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TOP223G-TL | 功能描述:交流/直流开关转换器 15W 85-265 VAC 25W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TOP223P | 功能描述:交流/直流开关转换器 15W 85-265 VAC 25W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
| TOP223PN | 功能描述:交流/直流开关转换器 15W 85-265 VAC 25W100/115/230 VAC RoHS:否 制造商:STMicroelectronics 输出电压:800 V 输入/电源电压（最大值）:23.5 V 输入/电源电压（最小值）:11.5 V 开关频率:115 kHz 电源电流:1.6 mA 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SSO-10 封装:Reel |
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