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uc384x.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 „uc3845 PWM einstellen?“ · Mikrocontroller und Digitale Elektronik ·
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UC3842.pdf
Unlessotherwise stated,these specifications apply for -25 < T amb < 85⋅C for UC2824X;0 < T amb < 70⋅C forUC384X;V =15Vi(note5); R = 10K;CT= 3.3nF) T UC284X UC384X Symbol Parameter Test Conditions Unit Min. Typ. Max. Min. Typ. Max. REFERENCE SECTION VREF Output Voltage Tj= 25⋅C Io= 1mA 4.95 5.00 5.05 4.90 5.00
in „UC3843 Flyback-Wandler 12V -> 180V“ · Analoge Elektronik und Schaltungstechnik ·
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UC3842B.pdf
between members of this family are the DESCRIPTION under-voltage lockout thresholds and maximum duty TheUC384xBfamilyofcontrolICsprovidesthenec- cycle ranges. The UC3842B and UC3844B have essary features to implement off-line or DC to DC UVLO thresholds of 16V (on) and 10V (off), ideally fixed frequency current
in „Reparatur Schaltnetzteil“ · Analoge Elektronik und Schaltungstechnik ·
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uc3842b.pdf
between members of this family are the DESCRIPTION under-voltage lockout thresholds and maximum duty TheUC384xBfamilyofcontrolICsprovidesthenec- cycle ranges. The UC3842B and UC3844B have essary features to implement off-line or DC to DC UVLO thresholds of 16V (on) and 10V (off), ideally fixed frequency current
in „40-390V HV DC-DC-Wandler vom Chinamann“ · Analoge Elektronik und Schaltungstechnik ·
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DAP8A.pdf
ultra−compact Switchmode Power Supplies and MARKING represents an excellent candidate to replace the UC384X devices. Due DIAGRAMS to its proprietary SMARTMOS▯ Very High Voltage Technology, the circuit allows the implementation of complete off−line AC−DC 8 adapters, battery charger and a high−power SMPS
in „Widerstand gesucht“ · Mikrocontroller und Digitale Elektronik ·
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ucc28c43.pdf
version with pin-for-pin compatibility to the D 50-µA Standby Current, 100-µA Maximum industry standard UC384xA family and UC384x family of PWM controllers. In addition, lower D Low Operating Current of 2.3 mA at 52 kHz startup voltage versions of 7 V are offered as D Fast 35-ns Cycle-by-Cycle Overcurrent
in „SNT will nicht anlaufen - falsches TI Datenblatt?“ · Analoge Elektronik und Schaltungstechnik ·
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LD7536R.pdf
SOT-26 DIP-8 NAME FUNCTION 1 8 GND Ground 2 7 COMP Voltage feedback pin (same as the COMP pin in UC384X). Connect a photo-coupler to close the control loop and achieve the regulation. Pull this pin below 0.95V to shutdown the controller into latch mode until the AC resume power-on. Connecting this pin
in „DENON DN-508MX Netzteil defekt“ · Analoge Elektronik und Schaltungstechnik ·
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ncp1200.pdf
all the necessary IF V CC decreasing > V CCON THEN Current Source is components normally needed in UC384X based supplies: OFF, output is pulsing timing components, feedback devices, low−pass filter and IF V CC increasing < VCCOFF THEN Current Source is self−supply. This later point emphasizes the fact
in „NCP1200D6 Schaltnetzteil IC“ · Mikrocontroller und Digitale Elektronik ·
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NCP1200.pdf
all the necessary IF V CC decreasing > V CCON THEN Current Source is components normally needed in UC384X based supplies: OFF, output is pulsing timing components, feedback devices, low−pass filter and IF V CC increasing < VCCOFF THEN Current Source is self−supply. This later point emphasizes the fact
in „Datenblatt gesucht DAP07“ · Analoge Elektronik und Schaltungstechnik ·
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AoE3_chapter9.pdf
LTC3780 - - 24 - 32 I • • • • • • M • 4 36 30V 2.4 0.80 200-400 0.6 6 4 N Y 13 6 Boost, Flyback, etc. UC384x 8 8 - - - I e - - - - - P - 9, 18ex 30 50,100% 11 2.5 500 m 0.5 V 1 N Y 20-30 7 ex c MIC38HC4x 8 8 - - - I e - - - - - P - 9, 16 20 50,100% 4 2.5 500 m 1 Vc 1 N Y 20-30 8 ISL684x 8 8 8 - 8 I e - -
in „Labornetzgerät - Fragen zum Schaltplan“ · Analoge Elektronik und Schaltungstechnik ·