ZHCSKL0D December 2009 – December 2019 BQ24610 , BQ24617
PRODUCTION DATA.
The BQ2461x provides internal loop compensation. With this scheme, best stability occurs when the LC resonant frequency, fo, is approximately 12 kHz to 17 kHz for BQ2461x.
Table 4 provides a summary of typical LC components for various charge currents:
| CHARGE CURRENT | 2 A | 4 A | 6 A | 8 A | 10 A |
|---|---|---|---|---|---|
| Output inductor LO | 6.8 μH | 6.8 μH | 4.7 μH | 3.3 μH | 3.3 μH |
| Output capacitor CO | 20 μF | 20 μF | 30 μF | 40 μF | 40 μF |
| Sense resistor | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ | 10 mΩ |
| PART DESIGNATOR | QTY | DESCRIPTION |
|---|---|---|
| Q1, Q2, Q3 | 3 | P-channel MOSFET, –30 V, –35 A, PowerPAK 1212-8, Vishay-Siliconix, Si7617DN |
| Q4, Q5 | 2 | N-channel MOSFET, 30 V, 12 A, PowerPAK 1212-8, Vishay-Siliconix, Sis412DN |
| D1 | 1 | Diode, dual Schottky, 30 V, 200 mA, SOT23, Fairchild, BAT54C |
| D2, D3, D4 | 3 | LED diode, green, 2.1 V, 20 mA, LTST-C190GKT |
| RAC, RSR | 2 | Sense resistor, 10 mΩ, 2010, Vishay-Dale, WSL2010R0100F |
| L1 | 1 | Inductor, 6.8 µH, 5.5A, Vishay-Dale IHLP2525CZ |
| C8, C9, C12, C13 | 4 | Capacitor, ceramic, 10 µF, 35 V, 20%, X7R |
| C4, C5 | 2 | Capacitor, ceramic, 1 µF, 16 V, 10%, X7R |
| C1, C3, C6, C11 | 4 | Capacitor, ceramic, 0.1 µF, 16 V, 10%, X7R |
| C2, C10 | 2 | Capacitor, ceramic, 0.1 µF, 50 V, 10%, X7R |
| C7 | 1 | Capacitor, ceramic, 1 µF, 50 V, 10%, X7R |
| C14, C15 (Optional) | 2 | Capacitor, ceramic, 0.1 µF, 50 V, 10%, X7R |
| C16 | 1 | Capacitor, ceramic, 2.2 µF, 35 V, 10%, X7R |
| Cff | 1 | Capacitor, ceramic, 22 pF, 25 V, 10%, X7R |
| CTTC | 1 | Capacitor, ceramic, 0.056 µF, 16 V, 5%, X7R |
| R1, R3, R5, R7 | 4 | Resistor, chip, 100 kΩ, 1/16 W, 0.5% |
| R2 | 1 | Resistor, chip, 500 kΩ, 1/16 W, 0.5% |
| R4 | 1 | Resistor, chip, 32.4 kΩ, 1/16 W, 0.5% |
| R6 | 1 | Resistor, chip, 10 kΩ, 1/16 W, 0.5% |
| R8 | 1 | Resistor, chip, 22.1 kΩ, 1/16 W, 0.5% |
| R9 | 1 | Resistor, chip, 9.31 kΩ, 1/16 W, 1% |
| R10 | 1 | Resistor, chip, 430 kΩ, 1/16 W, 1% |
| R11, R12, R13, R18, R19 | 5 | Resistor, chip, 10 kΩ, 1/16 W, 5% |
| R14, R15 (optional) | 2 | Resistor, chip, 100 kΩ, 1/16 W, 5% |
| R16 | 1 | Resistor, chip, 100 Ω, 1/16 W, 5% |
| R17 | 1 | Resistor, chip, 10 Ω, 1/4 W, 5% |
| R20 | 1 | Resistor, chip, 2 Ω, 1 W, 5% |