công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
|
UC1845L883B bảng dữ liệu(PDF) 7 Page - Texas Instruments |
|
|
UC1845L883B bảng dữ liệu(HTML) 7 Page - Texas Instruments |
7 / 56 page Temp Stability = VREF:max ; F VREF:min ; TJ:max ; F TJ:min ; 7 UC1842, UC2842, UC3842, UC1843, UC2843, UC3843 UC1844, UC2844, UC3844, UC1845, UC2845, UC3845 www.ti.com SLUS223D – APRIL 1997 – REVISED AUGUST 2016 Product Folder Links: UC1842 UC2842 UC3842 UC1843 UC2843 UC3843 UC1844 UC2844 UC3844 UC1845 UC2845 UC3845 Submit Documentation Feedback Copyright © 1997–2016, Texas Instruments Incorporated Thermal Information (continued) THERMAL METRIC(1) UCx84x UNIT D (SOIC) D (SOIC) P (PDIP) FK (LCCC) 8 PINS 14 PINS 8 PINS 20 PINS RθJC(bottom) Junction-to-case (bottom) thermal resistance — — — 4.1 °C/W (1) Adjust VCC above the start threshold before setting at 15 V (2) Specified by design. Not production tested. (3) Temperature stability, sometimes referred to as average temperature coefficient, is described by the equation: VREFmin and VREFmax are the maximum and minimum reference voltages measured over the appropriate temperature range. Note that the extremes in voltage do not necessarily occur at the extremes in temperature. (4) OUTPUT switching frequency, fSW, equals the oscillator frequency, fOSC, for the UCx842 and UCx843. OUTPUT switching frequency, fSW, is one half oscillator frequency, fOSC, for the UCx844 and UCx845. 7.5 Electrical Characteristics over operating free-air temperature range (unless otherwise noted) –55°C ≤ TA ≤ 125°C for the UC184x; –40°C ≤ TA ≤ 85°C for the UC284x, 0°C ≤ TA ≤ 70°C for the UC384x, VVCC = 15 V (1); 0.1 µF capacitor from VCC to GROUND, 0.1 µF capacitor from VREF to GROUND, RRT = 10 kΩ; CCT = 3.3 nF, TJ = TA. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT REFERENCE SECTION VVREF Reference voltage IVREF = 1 mA, TJ = 25°C UC184x and UC284x 4.95 5 5.05 V UC384x 4.9 5 5.1 Line regulation 12 ≤ VCC ≤ 25 V 6 20 mV Load regulation 1 ≤ IVREF ≤ 20 mA 6 25 mV Temperature stability See (2) (3) 0.2 0.4 mV/°C Total output variation Line, load, temperature (2) UC184x and UC284x 4.9 5.1 V UC384x 4.82 5.18 Output noise voltage 10 Hz ≤ fOSC ≤ 10 kHz, (2) T J = 25°C 50 μV Long term stability TA = 125°C, 1000 Hrs (2) 5 25 mV Output short circuit –30 –100 –180 mA OSCILLATOR SECTION fOSC Initial accuracy TJ = 25°C (4) 47 52 57 kHz Voltage stability 12 ≤ VCC ≤ 25 V 0.2% 1% Temperature stability TMIN ≤ TA ≤ TMAX (2) 5% VRT/CT Amplitude Peak-to-peak (2) 1.7 V ERROR AMPLIFIER SECTION VVFB Input voltage VCOMP = 2.5 V UC184x and UC284x 2.45 2.5 2.55 V UC384x 2.42 2.5 2.58 IVFB Input bias current UC184x and UC284x –1 µA UC384x –2 AVOL 2 ≤ VCOMP ≤ 4 V 65 90 dB Unity gain bandwidth TJ = 25°C (2) 0.7 1 MHz PSRR Power supply rejection ratio 12 ≤ VCC ≤ 25 V 60 70 dB I(snk) COMP sink current VVFB = 2.7 V, VCOMP = 1.1 V 2 6 mA I(src) COMP source current VVFB = 2.3 V, VCOMP = 5 V –0.5 –0.8 |
Số phần tương tự - UC1845L883B |
|
Mô tả tương tự - UC1845L883B |
|
|
Link URL |
Chính sách bảo mật |
ALLDATASHEET.VN |
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không? [ DONATE ] |
Alldatasheet là | Quảng cáo | Liên lạc với chúng tôi | Chính sách bảo mật | Trao đổi link | Tìm kiếm theo nhà sản xuất All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |