TL3844BDR

@@ -0,0 +1,54 @@+# TL3844BDR++**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-14++TL3844BDR from Texas Instruments, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | COMP | output | Error amplifier compensation pin. Provides access to the error amplifier output for loop compensation networks between COMP and VFB. Typical high-level output ≥5 V, low-level ≤1.1 V; source ≈0.5 mA, sink ≈2 mA. |+| 2 | VFB | input | Error amplifier inverting input (voltage feedback). Regulated to the internal reference divided down to ~2.5 V. Input bias current ≈ -0.3 µA typ. |+| 3 | ISENSE | input | Current-sense comparator input. Trips the PWM latch at ~1.0 V typ (0.9-1.1 V), providing cycle-by-cycle peak current limiting. Input range 0 V to 5.5 V; propagation delay to output ≈150 ns typ. |+| 4 | RT/CT | bidirectional | Oscillator RC input. External timing resistor to VREF and timing capacitor to GND set the oscillator frequency (up to 500 kHz recommended). Trimmed internal discharge current ≈8.3 mA typ; output frequency is one-half the oscillator frequency on the TL3844B (internal toggle flip-flop). |+| 5 | GND | power_in | Device power supply ground (analog/signal and PWM return). All device voltages are referenced to this terminal. On the 8-pin package, output ground and signal ground share this pin. |+| 6 | OUTPUT | output | Totem-pole PWM output for driving an N-channel power MOSFET gate. Delivers high peak current with rise/fall times ≈25 ns typ (150 ns max) into 1 nF; average output current up to 200 mA. VOH ≈13.5 V @ IOH = -20 mA; VOL ≈0.1 V @ IOL = 20 mA. Held low in UVLO (VOL ≤1.2 V while sinking 10 mA). |+| 7 | VCC | power_in | Device positive supply. UVLO start threshold ≈16 V (14.5-17.5 V), stop threshold ≈10 V (8.5-11.5 V). Absolute maximum 30 V (low-impedance source) or self-limiting for ICC < 30 mA; start-up current <0.5 mA, operating current ≈11 mA typ (17 mA max). |+| 8 | VREF | power_out | Internally trimmed 5 V reference output (5.0 V ±0.1 V at TJ = 25 °C, IO = 1 mA). Sources up to 20 mA (short-circuit current -100 mA typ) for external bias including the RT/CT timing resistor. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | SOIC-14 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `TL3844BDRD`+- `TL3844BDR`+- `TL3844BDRIDR`+- `TL3844BDRIDGSR`+- `TL3844BDRP`+- `TL3844BDRD (14)`++## CAD (KiCad official)++- Symbol: `TL3844BDR`+- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`+- 3D model: SOIC-14 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/tl3844b.pdf) (31 pp, sha256 `42e42dc7a6e780d9`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/tl3844bdr-datasheet.pdf)

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