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U3848-S08-R Datasheet(PDF) 10 Page - Unisonic Technologies |
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U3848-S08-R Datasheet(HTML) 10 Page - Unisonic Technologies |
10 / 13 page U3848/A/B/C LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 10 of 13 www.unisonic.com.tw QW-R103-033,B FUNCTIONAL DESCRIPTION(Cont.) C4 2 1 3 4 7 8 6 5 C3 C13 UTC U3848/A/B/C RT IC3 VCC 15V 5.5V Driver C4 2 1 3 4 7 8 6 5 C3 C13 UTC U3848 /A/B/C R17 RT IC3 VCC 3.5V FIG.8 OLP test circuit FIG.9 OVP test circuit VFB 7.2us 4.6v V FB Driver 7.2us VCC 16v VFB (4) Driver Output Section Rise edge time of driver output is about 200ns for avoiding Low EMI. When driver output VOL(MAX) is less than 2.5V with 200mA source current, and VOH(MIN) is more than 12.2V with 200mA sink current. C4 2 1 3 4 7 8 6 5 C3 C13 UTC U3848 A/B/C R17 RT IC3 VCC 15v Isink=200mA VOH (MIN ) C4 2 1 3 4 7 8 6 5 C3 C13 UTC U3848 /A/B/C R17 RT IC3 VCC 15v Isource=200mA VOL (MIN) FIG.10 driver test circuit with sink current FIG.11 driver test circuit with source current VFB V FB (5) External power switch MOS transistor Because U3848/A/B/C driver output voltage Low level threshold is about 2.5V, User may apply power MOS transistors with bigger threshold. 4N60 is recommended normally. |
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