Bill of Materials

Resistors

> R1 = 84.5 kΩ, 1 %, 0.25 W,

SMD 1206

> R2 = 158kΩ, 1 %, 0.25 W, SMD 1206

> R3 = 18 kΩ, 1 %, 0.25 W, SMD 1206

> R4 = 13 kΩ, 1 %, 0.25 W, SMD 1206

> R5,R7 = 1 kΩ, 1 %, 0.25 W,

SMD 1206

> R6 = 536 Ω, 1 %, 0.25 W, SMD 1206

> R8,R9 = 1.5 kΩ, 1 %, 0.25 W,

SMD 1206

> R10 = 10 kΩ, 1 %, 0.25 W, SMD 1206

> R11 = 100 kΩ, 1 %, 0.25 W, SMD

1206

> R12,R13 = 1.2 kΩ, 1 %, 0.25 W,

SMD 1206

> R14 = 4.7 kΩ, 1 %, 0.25 W,

SMD 1206

> R15 = 1.8 kΩ, 1 %, 0.25 W,

SMD 1206

Capacitors

> C1 = 3.3 nF, 5 %, 50 V, NP0,

SMD 1206

> C2,C7,C11 = 100 nF, 5 %, 50 V,

C0G, SMD 1206

> C3,C4,C6,C8,C9 = 10 μF, 10 %,

25 V, X7R, SMD 1206

> C5 = 1 μF, 10 %, 50 V, X7R,

SMD 1206

> C10 = 10 nF, 5 %, 50 V, X7R,

SMD 1206

> C12 = 470 nF, 10 %, 50 V, X7R,

SMD 1206

> C13 = 330 μF, 20 %, 35 V,

SMD 10.3x10.3

Inductors

> L1 = SCDS74T = 3.3 μH, 20 %,

3.5 A, 35 mΩ, SMD size

7.3x7.3x4.5 mm

Semiconductors

> D1,D2 = SL22-E3/52T, SMD SMB

> LED1 = 11-21/GPC-AM2P1/2T,

LED, green, SMD 1206

> LED2,LED3 = 15-21SDRC/

S530-A2/TR8, LED, red, SMD 1206

> IC1 = TPS61085DGKR,

> SMD VSSOP-8

> IC2 = XB8089D, SMD SOIC-8-EP

> IC3 = BQ24092DGQR,

> SMD MSOP-10-EP

> IC4 = TPS259621DDAR, SMD

> SO-PowerPad-8

Miscellaneous

> S1 = switch, DPDT, THT, 9.1x3.5 mm

(K2-2235D-F1)

> S2 = switch, SPDT, 250 VAC,

3 A (XKB, SS-12D06L5)

> K1 = USB-C BoB, Elektor Store

no. 191200

Optional

> PC1-PC6 = pinheader pin, 1x1

(BAT+/BAT-; +5V/GND; OUT/

GND)

> PCB 191188-1 v2.1

Details

This DIY LiPo Supercharger/Booster can charge a single-cell LiPo battery and protect it against the effects of overvoltage, overload, and short-circuits. Additionally, it can boost the battery voltage to 5 V or 12 V. The boosted output voltage is protected by an ‘eFuse’ IC outputting 1.52 A at 5 V or 0.76 A at 12 V maximum.

The charger part of the circuit needs a +5 V power supply which can be connected through USB-C, or simply two wires soldered to pads on the PCB.

In addition, other connections can be soldered to pads on the PCB or by using single pin headers.

Kit Contents

• 1x Main board pre-assembled with the 4 ICs
• 15x Resistors
• 3x LEDs
• 13x Capacitors
• 2x Switches
• 1x USB-C on a breakout board
• 2x Diodes

Please note: Battery is not included.

The board uses a DC/DC Converter, an IC charger, and an e Fuse from Texas Instruments. The battery protection IC is from Xysemi and provides under-voltage lockout, over current protection, and reverse battery protection.

The board is connected to the power and recharges the batteries via a USB-C connection.

Specifications

BatterySingle-cell lithium-ion or lithium-polymer batteryInput Voltage+5 V / 2 A max. Output Voltage5 V / 1.52 A

12 V / 0.76 ALiPo ProtectionXB8089DOvercharge Detection4.250 Overcharge Release4.10 VOverdischarge Detection2.50 VOverdischarge Release3 Overcorrect Detection10.0 Thermal ShutdownAuto-retryEnable/Under voltage LockoutRising: 1.2 V (typ.)

Falling: 1.1 V (typ.)

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