ZHCSNB8A February 2021 – January 2024 BQ25730
PRODUCTION DATA
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| EN_HIZ | RESET_REG | RESET_VINDPM | EN_OTG | EN_ICO_MODE | EN_PORT_CTRL | EN_VSYS_MIN_SOFT_SR | EN_OTG_BIGCAP |
| R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| BATFET_ENZ | EN_VBUS_VAP | OTG_VAP_MODE | IL_AVG | CMP_EN | BATFETOFF_HIZ | PSYS_OTG_IDCHG | |
| R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| LEGEND: R/W = Read/Write; R = Read only; -n = value after reset |
| BIT | FIELD | TYPE | RESET | DESCRIPTION |
|---|---|---|---|---|
| 7 | EN_HIZ | R/W | 0b | Device HIZ Mode Enable When the charger is in HIZ mode, the device draws minimal quiescent current. With VBUS above UVLO. REGN LDO stays on, and system powers from battery. 0b: Device not in HIZ mode <default at POR> 1b: Device in HIZ mode |
| 6 | RESET_REG | R/W | 0b |
Reset Registers All the registers are reset to POR default setting except the VINDPM register. 0b: Idle <default at POR> 1b: Reset all the registers to default values. After reset, this bit goes back to 0. |
| 5 | RESET_VINDPM | R/W | 0b | Reset VINDPM Threshold 0b: Idle 1b: Converter is disabled to measure VINDPM threshold. After VINDPM measurement is done, this bit goes back to 0 and converter starts. (When battery voltage is lower than VSYS_MIN this function is not recommended due to potential risk to crash system during VINDPM measurement .) |
| 4 | EN_OTG | R/W | 0b | OTG Mode Enable Enable device in OTG mode when OTG/VAP/FRS pin is HIGH. 0b: Disable OTG <default at POR> 1b: Enable OTG mode to supply VBUS from battery. |
| 3 | EN_ICO_MODE | R/W | 0b | Enable ICO Algorithm 0b: Disable ICO algorithm. <default at POR> 1b: Enable ICO algorithm. |
| 2 | EN_PORT_CTRL | R/W | 1b |
Enable BATFET control 0b: Disable BATFET control pin by HIZ BATDRV pin 1b: Enable BATFET control pin by activate BATDRV pin |
| 1 | EN_VSYS_MIN_SOFT_SR | R/W | 0b | Enable VSYS_MIN soft slew rate transition 0b: Disable VSYS_MIN soft slew rate transition <default at POR> 1b:Enable VSYS_MIN soft slew rate transition (1LSB/8μs=12.5mV/μs) |
| 0 | EN_OTG_BIGCAP | R/W | 0b |
Enable OTG compensation for VBUS effective capacitance larger than 33 μF 0b: Disable OTG large VBUS capacitance compensation (Recommended for VBUS effective capacitance smaller than 33 μF) <default at POR> 1b: Enable OTG large VBUS capacitance compensation (Recommended for VBUS effective capacitance larger than 33 μF) |
| BIT | FIELD | TYPE | RESET | DESCRIPTION |
|---|---|---|---|---|
| 7 | BATFET_ENZ | R/W | 0b | Turn off BATFET under battery only mode. If charger is not in
battery only mode this bit is not allowed to be written to 1. Under
battery only OTG mode, this bit is forced to be 0b. 0b: Not force turn off BATFET <default at POR> 1b: Force turn off BATFET |
| 6 | EN_VBUS_VAP | R/W | 0b | Enable the VBUS VAP for VAP operation mode 2&3 0b: Disabled <default at POR> 1b: Enabled |
| 5 | OTG_VAP_MODE | R/W | 1b | The selection of the external OTG/VAP/FRS pin control. Don't recommend to change pin control after OTG/VAP/FRS pin is pulled high. 0b: the external OTG/VAP/FRS pin controls the EN/DIS VAP mode 1b: the external OTG/VAP/FRS pin controls the EN/DIS OTG mode <default at POR> |
| 4-3 | IL_AVG | R/W | 10b | Converter inductor average current clamp. It is recommended to choose the smallest option which is higher than maximum possible converter average inductor current. 00b: 6A 01b: 10A 10b: 15A <default at POR> 11b: Disabled |
| 2 | CMP_EN | R/W | 1b | Enable Independent Comparator with effective low. 0b: Disabled 1b: Enabled <default at POR> |
| 1 | BATFETOFF_HIZ | R/W | 0b |
Control BATFET on/off during charger HIZ mode. 0b: BATFET on during charger HIZ mode <default at POR> 1b: BATFET off during charger HIZ mode |
| 0 | PSYS_OTG_IDCHG | R/W | 0b | PSYS function during OTG mode. 0b: PSYS as battery discharge power minus OTG output power <default at POR> 1b: PSYS as battery discharge power only |