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UC3845.pdf
UC1842/3/4/5 UC2842/3/4/5 UC3842/3/4/5 Current Mode PWM Controller FEATURES DESCRIPTION • Optimized For Off-line And DC The UC1842/3/4/5 family of control ICs provides the necessary features to im- To DC Converters plement off-line or DC to DC fixed frequency current mode control schemes • Low Start Up Current (<1mA) with a minimal external parts count. Internally implemented circuits include un- der-voltage lockout featuring start up current less than 1mA, a precision refer- • Automatic Feed Forward ence trimmed for accuracy at the error amp input, logic to insure latched Compensation operation
in „Regler dimensionierung für Sperrwandler“ · Analoge Elektronik und Schaltungstechnik ·
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UC3845.pdf
UC1842/3/4/5 UC2842/3/4/5 UC3842/3/4/5 Current Mode PWM Controller FEATURES DESCRIPTION • Optimized For Off-line And DC The UC1842/3/4/5 family of control ICs provides the necessary features to im- To DC Converters plement off-line or DC to DC fixed frequency current mode control schemes • Low Start Up Current (<1mA) with a minimal external parts count. Internally implemented circuits include un- der-voltage lockout featuring start up current less than 1mA, a precision refer- • Automatic Feed Forward ence trimmed for accuracy at the error amp input, logic to insure latched Compensation operation
in „Current Mode PWM Controller“ · Analoge Elektronik und Schaltungstechnik ·
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uc3842.pdf
CU NIPDAU Level-1-260C-UNLIM & no Sb/Br) UC3845D8TR ACTIVE SOIC D 8 2500 Green (RoHS CU NIPDAU Level-1-260C-UNLIM & no Sb/Br) UC3845D8TRG4 ACTIVE SOIC D 8 2500 Green (RoHS CU NIPDAU Level-1-260C-UNLIM & no Sb/Br) UC3845DG4 ACTIVE SOIC D 14 50 Green
in „Reparatur Schaltnetzteil“ · Mikrocontroller und Digitale Elektronik ·
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UC3842.pdf
current lessthan1 mA,a precisionUC3845bytheadditionof aninternaltoggleflipflop erencetrimmedforaccuracyat theerrorampinput,whichblanksthe outputoff every otherclock cycle. BLOCK DIAGRAM (toggle flip flop used only in U3844 and UC3845) October
in „UC3843 Flyback-Wandler 12V -> 180V“ · Analoge Elektronik und Schaltungstechnik ·
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UC3842B.pdf
DIAGRAM (toggle flip flop used only in UC3844B and UC3845B) Vi 7 UVLO 34V 5V 8 VREF GROUND 5 S/R REF 5V 50mA INTERNAL 2.50V BIAS VREF GOOD LOGIC 6 4 OUTPUT RT/CT OSC T + ERROR AMP. 2R S VFB 2 - R PWM 1 R 1V LATCH COMP CSENSET CURRENT 3 COMPARATOR UC3842B
in „Reparatur Schaltnetzteil“ · Analoge Elektronik und Schaltungstechnik ·
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uc3842b.pdf
DIAGRAM (toggle flip flop used only in UC3844B and UC3845B) Vi 7 UVLO 34V 5V 8 VREF GROUND 5 S/R REF 5V 50mA INTERNAL 2.50V BIAS VREF GOOD LOGIC 6 4 OUTPUT RT/CT OSC T + ERROR AMP. 2R S VFB 2 - R PWM 1 R 1V LATCH COMP CSENSET CURRENT 3 COMPARATOR UC3842B
in „40-390V HV DC-DC-Wandler vom Chinamann“ · Analoge Elektronik und Schaltungstechnik ·
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axpert_vm_iii5000__c.pdf
0.15ohm) The D61 are (MUR4100ERLG 4A 1000V UFST) The D60 are (RHRP860 8A 600V SFST) The U14 are (IC UC3845BNG DIP-8) The Q6 are (PMBT2907A 0.6A 60V SMD) The TX3 are (TX 16:16:16 FER EE16) The D65 are (RS1J 1A 600V SMD) V-RDP-004-73 A 维修手册 专案名称： Axpert VM III-5000/VM III-3000 专案编号： S1711171 修订版次： 00 PAGE
in „PV Wechselrichter startet nicht mehr und verursacht Kurzschluss bzw. hohen Strom“ · Analoge Elektronik und Schaltungstechnik ·
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nacrt_main_board_rev10a_coulomb.pdf
1uF Vcc IRF840 +12V Sense Sense NTC4 1 Comp Vref8 R245 2 2 +12V 10k 280V AC 1 4 2 FB U16 OUT 6 22R UC3845L Ctrl 1 1 Ctrl C102 C104 3 I sense GND RT/CT BAT54S-V R252 10n 10n 5 1k2 C105 C28 R122 R119 R118 200A 100n R9 47uF R127 R126 R121 CN4 CN8 fuse W11 1k 2k0 3k 1k 10k 3k9 10k NTC4 NTC3 2 3 C100 C101 D64b
in „SUCHE Transistor KGF75N65KDF“ · Analoge Elektronik und Schaltungstechnik ·
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Nahaufnahme eines integrierten Schaltkreises auf Leiterplatte
ST CHN UC3845B F87207 104 C6 R13
in „Induktivität abgebrannt - Erklärung gesucht“ · Analoge Elektronik und Schaltungstechnik · · Platinenfotos
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Flusswandler.pdf
-AL R46 3 GNDPWR 1N4148W 10R V C23 C25 H D17 HS2 TP4 ES1J Heatsink 10u 100n U8 PWM TR3 R44 2 TP1 UC3845D8 U9 P0544NLT 10R B FB 7 UCC27425QDRQ1 C34 3 1 Q6 B FB GNDPWR GNDPWR Comp 1 VCC R36 1 6 R6035VNXC7G COMP 1k ENBA VDD 10u D14 Vref 8 VREF OUT 6 2 INA OUTA 7 8 15V,bi 3 VOUT1+ 6 HV_SW1 4 VOUT1+ C17 R43
in „Kurzschlussinduktivität != Streuinduktivität?“ · Analoge Elektronik und Schaltungstechnik ·
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SS-160SE-6N.pdf
C27 200K VR RTCT GIsen U2B D12 J2 IS04 D C C26 1uF 10K LM324 RL1 1N4148 VIPER20A 4 SOURE V O 102 5 UC3845A 1N4148 D C37 R21 C34 D19 104 R19 103 R27 2 1 C25 C36 Q2 C12 C14 R23 56K IS4 D11 1N4148 9013 103 Q3 47K C 0 104 R19 681 R22 9013 104 4.7V/0.5W 3 / C29 D24 R22 223 102 8.2K C30 C10 R20 C11 C13 472 104
in „Schweiß Inverter reparieren“ · Analoge Elektronik und Schaltungstechnik ·
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Schematic_TransistorTester_1.49_arduini_nano_2023-05-01.pdf
discharges tested capacitors R10 33K▯' C10 100n D BC557 D Q3 GND R15 R27 R7 27K▯' 10K▯' U2 3,3K▯' R22 UC3845B 10K▯' C8 K1 SW1 C7 100n SHOTKI 1 COMP VREF 8 100u 1 2 1N5817(SHOTKI 0.2 V) R20 1K▯' Rotary_Encoder 2 VFB VCC 7 R28 R29 10▯' LED1 1 A R26 3 Isense OUT 6 Q5 LED-TH-5mm_R Q2 R21 2 C 1K▯' 58K▯' BC547
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gysmi_165_inverter.pdf
Cde_CIN 6 9 1 PGND NC 64028 64051 7 CIN LVG 8 64057 470nF (50V) 100uF (35V) SGND PGND R03_16P M_16V_H UC3845D 64079 D03_02P Cde_GB R03_11P 64015 -HT Vref -HT -HT L6386 64026 100 64009 BAT42W Vref 1.82K C05_2P R05_06P 64028 -HT 64010 470nF (50V) C03_09P C03_10P C03_11P 2.21K 64047 64029 64006 V_24V_S Q05_03P
in „(S) Service manual Gysmi“ · Markt ·
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slua110.pdf
threshold of approximately 1 volt. FIXED “OFF-TIME”, CURRENT CONTROLLED “ON-TIME” UC3851 /UC3844A / UC3845A *GROUND RAMP OR CURRENT SENSE INPUT OSCILLATORS WITH SEPARATE RT & CT PINS SCHEMATIC U C 3 8 2 3 / U C 3 8 2 5 / U C 3 8 4 7 *GROUND RAMP OR CURRENT SENSE INPUT USE NONINV E/a INPUT FOR REVERSE V/
in „Boost Konverter“ · Mikrocontroller und Digitale Elektronik ·
