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TEA1738LT Arkusz danych(PDF) 8 Page - NXP Semiconductors |
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TEA1738LT Arkusz danych(HTML) 8 Page - NXP Semiconductors |
8 / 21 page TEA1738T_TEA1738LT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Preliminary data sheet Rev. 1 — 31 December 2010 8 of 21 NXP Semiconductors TEA1738T; TEA1738LT GreenChip SMPS control IC In the TEA1738T when the Vprot(OPTIMER) voltage is reached the device is restarted. The TEA1738LT is latched in an off state when the Vprot(OPTIMER) voltage is reached. 7.10 Current mode control (ISENSE pin) Current mode control is used for its good line regulation. The primary current is sensed by the ISENSE pin across external resistor R9 (see Figure 3) and compared with an internal control voltage. The internal control voltage is proportional to the CTRL pin voltage (see Figure 7). Fig 5. Overpower delay (TEA1738T) Fig 6. Overpower delay: latched (TEA1738LT) 014aaa930 VOPTIMER VISENSE VO 400 mV protection high load high load normal load Vprot(OPTIMER) IO 014aaa968 VOPTIMER VISENSE VO 400 mV protection high load high load normal load Vprot(OPTIMER) IO |
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