ZHCSX73C August 2006 – October 2024
PRODUCTION DATA
- 1
- 1 特性
- 2 应用
- 3 说明
- 4 Pin Configuration and Functions
-
5 Specifications
- 5.1 Absolute Maximum Ratings
- 5.2 ESD Ratings
- 5.3 Recommended Operating Conditions
- 5.4 Thermal Information
- 5.5 Reference Section Electrical Characteristics
- 5.6 Oscillator Section Electrical Characteristics
- 5.7 Error-Amplifier Section Electrical Characteristics
- 5.8 Current-Sense Section Electrical Characteristics
- 5.9 Output Section Electrical Characteristics
- 5.10 Undervoltage-Lockout Section Electrical Characteristics
- 5.11 Pulse-Width Modulator Section Electrical Characteristics
- 5.12 Supply Voltage Electrical Characteristics
- 5.13 Typical Characteristics
- 6 Detailed Description
- 7 Application and Implementation
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
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订购信息
7.1 Application Information
The error-amplifier configuration circuit is shown in Figure 7-1.
A. Error amplifier can source or sink up to 0.5 mA.
Figure 7-1 Error-Amplifier ConfigurationThe current-sense circuit is shown in Figure 7-2.
A. Peak current (IS) is determined by the formula: IS(max) = 1 V/RS
B. A small RC filter formed by resistor Rf and capacitor Cf may be required to suppress switch transients.
Figure 7-2 Current-Sense CircuitThe oscillator frequency is set using the circuit shown in Figure 7-3. The frequency is calculated as:
f = 1 / RTCT
For RT > 5 kΩ:
f ≉ 1.72 / RTCT
Figure 7-3 Oscillator Section