Datasheet U2008B (Atmel) - 3
| 制造商 | Atmel |
| 描述 | Low-cost Phase-control IC with Soft Start |
| 页数 / 页 | 15 / 3 — Atmel U2008B. Pin Configuration. Figure 2-1. Atmel. U2008B. Table 2-1. … |
| 文件格式/大小 | PDF / 734 Kb |
| 文件语言 | 英语 |
Atmel U2008B. Pin Configuration. Figure 2-1. Atmel. U2008B. Table 2-1. Pin. Symbol. Function. 2.1. Mains Supply, Pin 5
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Atmel U2008B 2. Pin Configuration Figure 2-1.
Pinning ISENSE 1 8 OUTPUT Cϕ 2 7 VSYNC
Atmel U2008B
CONTROL 3 6 Rϕ GND 4 5 -VS
Table 2-1.
Pin Description
Pin Symbol Function
1 ISENSE Load current sensing 2 Cϕ Ramp voltage 3 CONTROL Control input/compensation output 4 GND Ground 5 -VS Supply voltage 6 Rϕ Ramp current adjustment 7 VSYNC Voltage synchronization 8 OUTPUT Trigger output
2.1 Mains Supply, Pin 5
The Atmel® integrated circuit U2008B, which also contains voltage limiting, can be connected via D and R to the mains supply, see Figure 1-2 on page 2. Supply voltage, between pin 4 1 1 (pos., ⊥) and pin 5, is smoothed by C . 1 The series resistance R1 can be calculated as follows: V – V M Smax R = 0.85 × --------------- 1max 2 × Itot where: V = Mains voltage M V = Maximum supply voltage Smax I = I + I = Total current compensation tot Smax x I = Maximum current consumption of the IC Smax I = Current consumption of the external components x Operation with externally stabilized DC voltage is not recommended.
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4712D–AUTO–03/11 Document Outline Features Applications 1. Description 2. Pin Configuration 2.1 Mains Supply, Pin 5 2.2 Voltage Monitoring 2.3 Phase Control, Pin 6 2.4 Automatic Retriggering 2.5 Current Synchronization, Pin 8 2.6 Voltage Synchronization with Mains Voltage Compensation, Pin 7 2.7 Load Current Detection, Pin 1 3. Absolute Maximum Ratings 4. Thermal Resistance 5. Electrical Characteristics 6. Ordering Information 7. Package Information 8. Revision History
Atmel U2008B 2. Pin Configuration Figure 2-1.
Pinning ISENSE 1 8 OUTPUT Cϕ 2 7 VSYNC
Atmel U2008B
CONTROL 3 6 Rϕ GND 4 5 -VS
Table 2-1.
Pin Description
Pin Symbol Function
1 ISENSE Load current sensing 2 Cϕ Ramp voltage 3 CONTROL Control input/compensation output 4 GND Ground 5 -VS Supply voltage 6 Rϕ Ramp current adjustment 7 VSYNC Voltage synchronization 8 OUTPUT Trigger output
2.1 Mains Supply, Pin 5
The Atmel® integrated circuit U2008B, which also contains voltage limiting, can be connected via D and R to the mains supply, see Figure 1-2 on page 2. Supply voltage, between pin 4 1 1 (pos., ⊥) and pin 5, is smoothed by C . 1 The series resistance R1 can be calculated as follows: V – V M Smax R = 0.85 × --------------- 1max 2 × Itot where: V = Mains voltage M V = Maximum supply voltage Smax I = I + I = Total current compensation tot Smax x I = Maximum current consumption of the IC Smax I = Current consumption of the external components x Operation with externally stabilized DC voltage is not recommended.
3
4712D–AUTO–03/11 Document Outline Features Applications 1. Description 2. Pin Configuration 2.1 Mains Supply, Pin 5 2.2 Voltage Monitoring 2.3 Phase Control, Pin 6 2.4 Automatic Retriggering 2.5 Current Synchronization, Pin 8 2.6 Voltage Synchronization with Mains Voltage Compensation, Pin 7 2.7 Load Current Detection, Pin 1 3. Absolute Maximum Ratings 4. Thermal Resistance 5. Electrical Characteristics 6. Ordering Information 7. Package Information 8. Revision History