| Original document(36 pages) 中文版 |
The invention provides a semiconductor device for inverter controlling that includes an AD converter and controls a pulse width of a multi-phase PWM signal on the basis of a digital value obtained by the AD converter, surely start an A/D conversion in combining the specified ON and OFF of a predetermined PWM signal. A timer (21) starts counting time in response to a signal supplied from a counter used for generating a PWM signal when the counter (23) has counted a given count value. A timer period of the timer (21) is calculated on the basis of a duty set value stored in a duty set resistor (in U phase occasion is 7U) included in a PWM signal generation circuit, and the timer period is stored in a timer period set resistor (22). The timer generates an AD conversion start factor signal when the timer (21) has counted the timer period stored in the timer period set resistor (22), and the AD conversion start factor signal is output to the corresponding AD converter (1g) so as to start AD conversion. Accordingly, the AD conversion can be more definitely started. |
Application Number
申请号 |
03101465 |
Application Date
申请日 |
2003.01.09 |
| Title 名称 |
Semiconductor device for inverter control |
Publication Number
公开号 |
1432939 |
Publication Date
公开日 |
2003.07.30 |
| Approval Pub. Date |
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Granted Pub. Date |
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| International Classification 分类号 |
G06F15/78 |
Applicant(s) Name
申请人 |
Matsushita Electric Industrial Co., Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Ohara Katsu;Kawamichi Koji |
| Attorney & Agent 代理人 |
wang huimin |
| More information 更 多 信 息 |
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