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TL3845BDRG4, TL3845BN, TL3845D

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Info of TL3845BDRG4
Info of TL3845BN
Info of TL3845D

TL3845BDRG4, TL3845BN, TL3845D Selling Leads, Datasheet

MFG:Texas Instruments Category:Integrated Circuits (ICs) Package Cooled:08+ D/C:09+

TL3845BDRG4, TL3845BN, TL3845D Datasheet download

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Part Number: TL3845BDRG4

Category: Integrated Circuits (ICs)

MFG: Texas Instruments

Package Cooled: 08+

D/C: 09+

Description: IC CURR-MODE PWM CTRLR 14-SOIC

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TL3845BDRG4 Parameters

Technical/Catalog Information	TL3845BDRG4
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
PWM Type	Current Mode
Number of Outputs	1
Package / Case	14-SOIC (3.9mm Width), 14-SOL
Packaging	Tape & Reel (TR)
Duty Cycle	50%
Voltage - Supply	7.6 V ~ 30 V
Frequency-Max	500kHz
Buck	No
Boost	Yes
Flyback	Yes
Inverting	No
Doubler	No
Divider	No
Cuk	No
Isolated	No
Drawing Number	296; 4040047-3; D; 14
Operating Temperature	0°C ~ 70°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TL3845BDRG4 TL3845BDRG4

TL3845D Parameters

Technical/Catalog Information	TL3845D
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
PWM Type	Current Mode
Number of Outputs	1
Package / Case	14-SOIC (3.9mm Width), 14-SOL
Packaging	Tube
Duty Cycle	50%
Voltage - Supply	7.6 V ~ 30 V
Frequency-Max	500kHz
Buck	No
Boost	Yes
Flyback	Yes
Inverting	No
Doubler	No
Divider	No
Cuk	No
Isolated	No
Drawing Number	296; 4040047-3; D; 14
Operating Temperature	0°C ~ 70°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TL3845D TL3845D

TL3845D General Description

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout(UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation(PWM) comparator (that 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 when it is in the off state.

Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges.Typical UVLO thresholds of 16 V (on) and 10 V (off) on the TLx842 and TLx844 devices make them ideally suited to off-line applications. The corresponding typical thresholds for the TLx843 and TLx845 devices are 8.4 V (on) and 7.6 V (off). The TLx842 and TLx843 devices can operate to duty cycles approaching 100%. A duty-cycle range of 0 to 50% is obtained by the TLx844 and TLx845 by the addition of an internal toggle flip-flop, which blanks the output off every other clock cycle.

The TL284x-series devices are characterized for operation from 40°C to 85°C. The TL384x-series devices are characterized for operation from 0°C to 70°C.

TL3845D Maximum Ratings

Supply voltage (see Note 1) (I_CC < 30 mA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . Self limiting
Analog input voltage range, V_I (VFB and ISENSE) . . . . . . . . . . . . . . . . . . . . . . . . . .0.3 V to 6.3 V
Output voltage, V_O (OUTPUT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V
Input voltage, V_I, (V_C, D package only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 V
Supply current, I_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA
Output current, I_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1 A
Error amplifier output sink current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 mA
Package thermal impedance, _JA(see Notes 2 and 3): D package . . . . . . . . . . . . . . . . . 86°C/W
D-8 package . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W
P package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85°C/W
Virtual junction temperature, T_J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . 150°C
Output energy (capacitive load) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 J
Lead temperature, 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . 260°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C

TL3845D Connection Diagram

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