参数资料
型号: CS1601-FSZ
厂商: Cirrus Logic Inc
文件页数: 9/16页
文件大小: 0K
描述: IC PFC CONTROLLER BALLAST 8SOIC
产品变化通告: CS1501, 1601 Datasheet Update Change 11/Jan/2012
设计资源: CS150x/160x PCB Layout Guidelines
Driving Mosfets with CS1501/1601
CS1501/1601 Driving ZCD Pin from Mosfet Drain
特色产品: CS1501/CS1601 Power Factor Correction IC Controllers
标准包装: 100
类型: PFC/镇流器控制器
频率: 70kHz
电流 - 电源: 1.5mA
电流 - 输出: 1A
电源电压: 7.9 V ~ 17 V
工作温度: -40°C ~ 125°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 散装
其它名称: 598-1915
CS1601
5. GENERAL DESCRIPTION
The CS1601 offers numerous features, options, and
functional capabilities to the electronic product lighting
Figure 12 illustrates how the operating frequency of CS1601H
changes with output power and the peak of the line voltage.
designer. This digital power factor correction (PFC) control IC
is designed to replace legacy analog PFC controllers with
minimal design effort.
5.1 PFC Operation
One key feature of the CS1601 is its operating frequency
profile. Figure 10 illustrates how the frequency varies over a
half cycle of the line voltage in steady-state operation. When
power is first applied to the CS1601, it examines the line
voltage and adapts its operating frequency to the line voltage,
100
75
50
25
Vin< 182 VAC (Input Voltage 108 –305 VAC, V link = 460 V)
Vin< 158 VAC (Input Voltage 90 – 264 VAC, V link = 400V)
Vin> 156 VAC (Input Voltage 108 –305 VAC , V link = 460V)
Vin >136 VAC (Input Voltage 90 –264 VAC , V link = 400V)
as shown in Figure 10. The operating frequency is varied from
the peak to the trough of the AC input. During startup, the
control algorithm generates maximum power while operating
0
5
20
40 60
% P O max
80
100
in critical conduction mode (CRM), providing an approximate
square-wave current envelope within every half-line cycle.
120
Switching Freq. (% of Max.)
100
80
60
Figure 12. CS1601H Max Switching Freq vs.Output Power
When P O falls below 5%, the CS1601 changes to Burst Mode.
(Refer to 5.3 Burst Mode on page 10 for more information.)
The CS1601 is designed to function as a DCM controller.
However, during peak periods, the controller may interchange
control methods and operate in a quasi-critical-conduction
mode (quasi-CRM) at low line. For example, at 108VAC main
40
20
0
Line Voltage (% of Max.)
input under full load, the PFC controller will function as a
quasi-CRM controller at the peak of the AC line cycle, as
shown in Figure 13.
0
45 90 135 180
Rectified Line Voltage Phase (Deg.)
DCM
Quasi CRM
DCM
Quasi CRM
DCM
Figure 10. Switching Frequency vs. Phase Angle
Figure 11 illustrates how the operating frequency of the
CS1601 (as a percentage of maximum frequency) changes
with output power and the peak of the line voltage.
I LB
I AC
70
60
48
40
20
Vin <182 VAC (Input Voltage 108 –305 VAC , V link = 460V)
Vin <158 VAC (Input Voltage 90 –264 VAC, V link = 400 V)
Vin >156 VAC (Input Voltage 108 – 305 VAC, V link = 460V)
Vin >136 VAC (Input Voltage 90 –264 VAC , V link = 400 V)
t [ms]
Figure 13. DCM and Quasi-CRM Operation with CS1601
The zero-current detection (ZCD) of the boost inductor is
achieved using an auxiliary winding. When the stored energy
of the inductor is fully released to the output, the voltage on the
ZCD pin decreases, triggering a new switching cycle. This
quasi-resonant switching allows the active switch to be turned
on with near-zero inductor current, resulting in a nearly
0
5
20
40
% P O max
60
80
100
lossless switch event. This minimizes turn-on losses and EMI
noise created by the switching cycle. PFC control is achieved
during light load by using on-time modulation.
Figure 11. CS1601 Max Switching Freq vs. Output Power
DS931F3
9
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