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TL3843BP-TUDI

Public Made by Adom

by adom

Tudi AC-DC Controllers And Regulators, DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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3D Model

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Symbol & Footprint

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Datasheet

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Contents

README

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TL3843BP-TUDI

Tudi · AC-DC Controllers And Regulators · DIP-8

TL3843BP-TUDI from Tudi, in a DIP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 COMP output Error amplifier output used for loop compensation, with an error amplifier output sink current absolute maximum of 10 mA.
2 VFB input Inverting input of the error amplifier, normally connected to the switching supply output through a resistor divider, with analog input voltage limited to -0.3 V to 5.5 V.
3 ISENSE input Current-sense input carrying a voltage proportional to inductor current that the PWM uses to terminate output conduction, with analog input voltage limited to -0.3 V to 5.5 V and a maximum input signal of about 1.0 V typical.
4 RT/CT passive Oscillator timing pin where resistor RT connects to Vref and capacitor CT connects to ground, programming the oscillator frequency and maximum output duty cycle.
5 GND power_in Combined control circuitry and power ground for the IC (listed as GROUND in the pin function table).
6 OUTPUT output Totem-pole output that directly drives a power MOSFET gate, sourcing and sinking peak currents up to 1 A, and is low when in the off state.
7 VCC power_in Positive supply pin of the IC, with a supply voltage absolute maximum of 30 V from a low-impedance source.
8 Vref power_out Reference output providing 5.0 V typical (4.9 V to 5.1 V at 1 mA) and the charging current for CT through RT.

Key specifications

Parameter Value
Manufacturer Tudi
Package DIP-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage (low impedance source) VCC 30 V low impedance source 2
Output Current IO -1 1 A 2
Input Voltage (Analog Inputs pins 2,3) VI -0.3 5.5 V Analog inputs pins 2,3 2
Error Amp Output Sink Current ISINK (E.A) 10 mA 2
Power Dissipation PO 1 W TA=25°C 2
Storage Temperature Range Tstg -65 150 °C 2
Lead Temperature (soldering 5 sec.) TL 260 °C soldering 5 sec. 2
Operating ambient temperature (TL384xB series) TA 0 70 °C TA=0°C to +70°C, unless otherwise specified 3
Reference Output Voltage VREF 4.9 5 5.1 V TJ = 25°C, IREF = 1 mA 3
Line Regulation ΔVREF 6 20 mV 12V ≤ VCC ≤ 25 V 3
Load Regulation ΔVREF 6 25 mV 1 mA ≤ IREF ≤ 20mA 3
Short Circuit Output Current ISC -100 -180 mA TA = 25°C 3
Oscillation Frequency f 47 52 57 KHz TJ = 25°C 3
Frequency Change with Voltage Δf/ΔVCC 0.05 1 % 12V ≤ VCC ≤ 25 V 3
Input Bias Current IBIAS -0.1 -2 µA VFB=3V 3
Input Voltage VI(E.A) 2.42 2.5 2.58 V Vpin1 = 2.5V 3
Open Loop Voltage Gain AVOL 65 90 dB 2V ≤ V0 ≤ 4V 3
Unity Gain Bandwidth UGBW 0.5 0.6 MHz Tj=25 C, Note 3 3
Power Supply Rejection Ratio PSRR 60 70 dB 12V ≤ VCC ≤ 25 V 3
Output Sink Current ISINK 2 7 mA Vpin2 = 2.7V, Vpin1 = 1.1V 3
Output Source Current ISOURCE -0.5 -1 mA Vpin2 = 2.3V, Vpin1 = 5V 3
High Output Voltage (E.A.) VOH 5 6 V Vpin2 = 2.3V, RL = 15KΩ to GND 3
Low Output Voltage (E.A.) VOL 0.8 1.1 V Vpin2 = 2.7V, RL = 15KΩ to PIN 8 3
Gain GV 2.85 3 3.15 V/V Note 1 & 2 3
Maximum Input Signal VI(MAX) 0.9 1 1.1 V Vpin1 = 5V (Note 1) 3
Input Bias Current (current sense) IBIAS -3 -10 µA Vpin3 = 3V 3
Low Output Voltage VOL 0.08 0.4 V ISINK = 20 mA 3
Low Output Voltage VOL 1.4 2.2 V ISINK = 200 mA 3
High Output Voltage VOH 13 13.5 V ISINK = 20 mA 3
High Output Voltage VOH 12 13 V ISINK = 200 mA 3
Rise Time tR 45 150 nS TJ = 25°C, CL = 1nF (Note 3) 3
Fall Time tF 35 150 nS TJ = 25°C, CL = 1nF (Note 3) 3
Start Threshold VTH(ST) 7.8 8.4 9 V TL2843/45,TL3843/45 3
Min. Operating Voltage (After Turn On) VOPR(min) 7 7.6 8.2 V TL2843/45,TL3843/45 3
Max. Duty Cycle D(MAX) 95 97 100 % TL2842/43,TL3842/43 3
Min. Duty Cycle D(MAX) 0 % 3
Start-Up Current IST 0.17 0.3 mA TL3842/43/44/45 3
Operating Supply Current ICC (OPR) 13 17 mA Vpin3 = Vpin2 = 0V 3
Zener Voltage VZ 30 38 V ICC=25 mA 3
Oscillator Amplitude (peak to peak) V(OSC) 1.6 V peak to peak 3
Supply Voltage Rejection SVR 70 dB 12V ≤ VCC ≤ 25 V (Note 1) 3

CAD (KiCad official)

  • Symbol: TL3843BP-TUDI
  • Footprint: Package_DIP:DIP-8_W7.62mm
  • 3D model: DIP-8 (KiCad packages3D, STEP)
  • 3D model files: tl3843bp-tudi-etched.step / tl3843bp-tudi-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tl3843bp-tudi.step / tl3843bp-tudi.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Tudi datasheet (11 pp, sha256 05fbdc4090dd7e00, retrieved 2026-10-15, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF