TL2843P

Operating Supply Voltage :
Operating Supply Current :
Number of Outputs : 1
Duty Cycle (Max) : 97 %
Mounting Style : Through Hole
Switching Frequency : 500 KHz
Maximum Operating Temperature : + 85 C
Rise Time : 50 ns
Fall Time : 50 ns
Package / Case : PDIP-8


Pinout




Specifications

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


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.

Parameters:

Technical/Catalog Information	TL2843P
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
PWM Type	Current Mode
Number of Outputs	1
Package / Case	8-DIP (300 mil)
Packaging	Tube
Duty Cycle	100%
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; 4040082; P; 8
Operating Temperature	-40°C ~ 85°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	TL2843P TL2843P