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参数资料
| 型号： | SSL1623PH/N1,112 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 7/18页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HIG PWR AC IN 16-DIP |
| 标准包装： | 1,000 |
| 恒定电流： | 是 |
| 拓扑： | 交直流离线开关，反激式，PWM |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 频率： | 10kHz ~ 200kHz |
| 电源电压： | 80 VAC ~ 276 VAC |
| 安装类型： | 通孔 |
| 封装/外壳： | 16-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 16-DIP |
| 包装： | 管件 |
NXP Semiconductors
40
phase
( ° )
20
0
? 20
SSL1623PH
SMPS IC for mains LED drivers
001aaa311
? 40
0
200
400
600
800
f (kHz)
Reflected voltage at N × V o = 80 V.
Fig 4.
Typical phase of drain ringing at switch-on
8.5 Demagnetization
The system operates in discontinuous conduction mode all the time. As long as the
secondary stroke has not ended, the oscillator will not start a new primary stroke. During
the suppression time t sup(xfmr_ring) , demagnetization recognition is suppressed. This
suppression may be necessary in applications where the transformer has a large leakage
inductance and at low output voltages.
8.6 Protection
8.6.1 Overcurrent protection
The cycle-by-cycle peak drain current limit circuit uses the external source resistor R I
(see Figure 5 ) to measure the current. The circuit is activated after the leading edge
blanking time t leb . The protection circuit limits the source voltage to V SOURCE(max) and thus
limits the primary peak current.
8.6.2 Short-winding protection
The short-winding protection circuit is also activated after the leading edge blanking time.
If the source voltage exceeds the short-winding protection voltage V swp , the SSL1623PH
stops switching. Only a power-on reset will restart normal operation. The short-winding
protection also protects against a secondary diode short-circuit.
8.6.3 Overtemperature protection
An accurate temperature protection is provided in the SSL1623PH. When the junction
temperature exceeds the thermal shutdown temperature, the IC stops switching. During
thermal protection the IC current is lowered to the start-up current. The IC continues
normal operation as soon as the overtemperature situation has disappeared.
SSL1623PH
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 02 — 13 September 2010
? NXP B.V. 2010. All rights reserved.
7 of 18
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