UC1843-HIREL Series

Space-grade, 30-V input, 1-A single-output 500-kHz PWM controller in DIE

Catalog

Space-grade, 30-V input, 1-A single-output 500-kHz PWM controller in DIE

Part	Current - Supply	Voltage - Input [Min]	Voltage - Input [Max]	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Applications	Voltage - Supply [Max]	Voltage - Supply [Min]	Package / Case	Package / Case	Package / Case	Utilized IC / Part	Current - Output	Voltage - Output	Frequency - Switching	Main Purpose	Outputs and Type	Outputs and Type	Regulator Topology	Supplied Contents	Board Type	Package / Case [y]	Package / Case [x]
Texas Instruments UC1843J	11 mA	-3 V	6.3 V	8-CDIP	125 °C	-55 °C	Through Hole	PWM Controller	28 V	12 V	7.62 mm	0.3 in	8-CDIP
Texas Instruments UC1843BEVM-CVAL		20 VDC	40 V											UC1843B-SP	10 A	5 V	200 kHz	DC/DC Step Down	Isolated	1	Flyback	Board(s)	Fully Populated
Texas Instruments UC1843MKGD1	11 mA	-3 V	6.3 V	Die	125 °C	-55 °C	Surface Mount	PWM Controller	30 VDC	7.6 V			Die
Texas Instruments UC1843AVTD2				Die			Surface Mount	PWM Controller	25 V	7.6 V			Die
Texas Instruments UC1843AMDREP	11 mA	-3 V	6.3 V	8-SOIC	125 °C	-55 °C	Surface Mount	PWM Controller	30 VDC	7.9 V			8-SOIC											3.9 mm	0.154 in
Texas Instruments UC1843AMDREPG4	11 mA	-3 V	6.3 V	8-SOIC	125 °C	-55 °C	Surface Mount	PWM Controller	30 VDC	7.9 V			8-SOIC											3.9 mm	0.154 in
Texas Instruments UC1843TD2				Die			Surface Mount	PWM Controller	30 VDC	7.6 V			Die

Catalog

Space-grade, 30-V input, 1-A single-output 500-kHz PWM controller in DIE

Key Features

• Controlled BaselineOne Assembly/Test Site, One Fabrication SiteExtended Temperature Performance of –55°C to 125°CEnhanced Diminishing Manufacturing Sources (DMS) SupportEnhanced Product Change NotificationQualification Pedigree(1)Optimized for Off-line and DC-to-DC ConvertersLow Start Up Current (<0.5 mA)Trimmed Oscillator Discharge CurrentAutomatic Feed Forward CompensationPulse-by-Pulse Current LimitingEnhanced Load Response CharacteristicsUnder-Voltage Lockout With HysteresisDouble Pulse SuppressionHigh Current Totem Pole OutputInternally Trimmed Bandgap Reference500 kHz OperationLow RO Error Amp(1)Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.Controlled BaselineOne Assembly/Test Site, One Fabrication SiteExtended Temperature Performance of –55°C to 125°CEnhanced Diminishing Manufacturing Sources (DMS) SupportEnhanced Product Change NotificationQualification Pedigree(1)Optimized for Off-line and DC-to-DC ConvertersLow Start Up Current (<0.5 mA)Trimmed Oscillator Discharge CurrentAutomatic Feed Forward CompensationPulse-by-Pulse Current LimitingEnhanced Load Response CharacteristicsUnder-Voltage Lockout With HysteresisDouble Pulse SuppressionHigh Current Totem Pole OutputInternally Trimmed Bandgap Reference500 kHz OperationLow RO Error Amp(1)Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.

Description

The UC1843 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%. The UC1843 family of control devices provides the necessary features to implement off-line or dc-to-dc fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1 mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off state. The under-voltage lockout threshold is 8.4 V and maximum duty cycle range is around 100%.