jsm/charger

An 80×50 mm 4S Li-ion charger PCB using a BQ24735 controller, protected 24 V input, MOSFET synchronous buck stage, 4.7 µH inductor, current sensing, filtering, XT30 battery output, and SMBus control interface to deliver up to 16.8 V at 5 A.

Version
0.0.1
License
unset
Stars
0

dist/index.d.ts

import * as react from 'react';

/**
 * Smart Charger 4S - Rev 17 (corrected wiring, functional-block schematic)
 *
 * Target: 4S Li-ion Battery Charger Daughterboard (16.8V max output, 5A charge current)
 * Main Controller: Texas Instruments BQ24735RGRR (VQFN-20) [LCSC: C353879]
 *
 * CHANGES FROM v16 (see chat summary for full rationale):
 *  - VCC now bootstraps from raw adapter input (J_PWR) through a damping/
 *    reverse-protection filter, not from the post-RBFET rail (which cannot
 *    power up until the FETs are already on).
 *  - ILIM now has a real divider from the 3.3V host rail (was grounded, which
 *    disabled charging).
 *  - Input capacitance moved off the switching (PHASE) node onto the actual
 *    VIN_SW rail; ACP/ACN sense filtering added at the correct nodes.
 *  - ACDET divider corrected to a safe ratio for a 24V input (was 12V, over
 *    the 7V absolute max).
 *  - PowerPAD now wired to GND with an explicit pin.
 *  - Dead battery-drain divider (R_BQ14/15/12 + C_BQ4) removed.
 *  - BQ24735 pin 11 corrected from NC to BATDRV.
 *  - REGN / BTST / IOUT decoupling values corrected to datasheet limits.
 *  - Schematic reorganized into six functional sections on an A3 sheet,
 *    small passive symbols, wiring kept as direct traces (no netlabels)
 *    except for the single shared GND net, which uses ground symbols to
 *    avoid dozens of criss-crossing ground wires.
 *
 * PARTS FLAGGED "(verify LCSC)" use a value not in the original BOM; confirm
 * the exact LCSC part number before ordering.
 */
declare function SmartCharger4S(): any;

export { SmartCharger4S as default };