BQ24745RHDT
ActiveSMBUS UP TO 4 CELL LEVEL 2 BUCK BATTERY CHAGER TO SUPPORT MULTIPLE BATTERY CHEMISTRIES
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BQ24745RHDT
ActiveSMBUS UP TO 4 CELL LEVEL 2 BUCK BATTERY CHAGER TO SUPPORT MULTIPLE BATTERY CHEMISTRIES
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Technical Specifications
Parameters and characteristics commom to parts in this series
| Specification | BQ24745RHDT | BQ24745 Series |
|---|---|---|
| Battery Chemistry | Multi-Chemistry | Multi-Chemistry |
| Battery Pack Voltage | 19.2 V | 19.2 V |
| Charge Current - Max [Max] | 8.064 A | 8.064 A |
| Current - Charging | Constant - Programmable | Constant - Programmable |
| Function | - | Battery Charger |
| Interface | I2C | I2C |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Cells [Max] [custom] | 4 | 4 |
| Number of Cells [Min] [custom] | 2 | 2 |
| Operating Temperature [Max] | 125 ¯C | 125 ¯C |
| Operating Temperature [Min] | -40 °C | -40 °C |
| Package / Case | 28-VFQFN Exposed Pad | 28-VFQFN Exposed Pad |
| Supplied Contents | - | Board(s) |
| Supplier Device Package | 28-VQFN (5x5) | 28-VQFN (5x5) |
| Type | - | Power Management |
| Voltage - Supply (Max) [Max] | 24 V | 24 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 250 | $ 6.21 | |
| 500 | $ 5.66 | |||
| 1250 | $ 4.93 | |||
| Texas Instruments | SMALL T&R | 1 | $ 7.66 | |
| 100 | $ 6.24 | |||
| 250 | $ 4.91 | |||
| 1000 | $ 4.16 | |||
BQ24745 Series
SMBus up to 4 cell level 2 Buck battery chager to support Multiple battery chemistries
| Part | Mounting Type | Charge Current - Max [Max] | Operating Temperature [Max] | Operating Temperature [Min] | Supplier Device Package | Number of Cells [Max] [custom] | Number of Cells [Min] [custom] | Battery Pack Voltage | Package / Case | Interface | Current - Charging | Voltage - Supply (Max) [Max] | Battery Chemistry | Type | Function | Supplied Contents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments BQ24745RHDT | Surface Mount | 8.064 A | 125 ¯C | -40 °C | 28-VQFN (5x5) | 4 | 2 | 19.2 V | 28-VFQFN Exposed Pad | I2C | Constant - Programmable | 24 V | Multi-Chemistry | |||
Texas Instruments BQ24745EVM | Power Management | Battery Charger | Board(s) | |||||||||||||
Texas Instruments BQ24745RHDR | Surface Mount | 8.064 A | 125 ¯C | -40 °C | 28-VQFN (5x5) | 4 | 2 | 19.2 V | 28-VFQFN Exposed Pad | I2C | Constant - Programmable | 24 V | Multi-Chemistry |
Description
General part information
BQ24745 Series
The bq24745 is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. The input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus interface. The bq24745 charges two, three, or four series Li+ cells, and is available in a 28-pin, 5-mm × 5 mmQFN package.
The bq24745 features dynamic power management (DPM) and input power limiting. These features reduce battery-charge current when the input power limit is reached to avoid overloading the ac adaptor when supplying the load and the battery charger simultaneously. A highly accurate current-sense amplifier enables precise measurement of input current from the ac adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its performance to the power available from the adapter. An integrated comparator monitors the input current through the current-sense amplifier, and indicates when the input current exceeds a programmable threshold limit.
The bq24745 is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery-charging applications. The input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus interface. The bq24745 charges two, three, or four series Li+ cells, and is available in a 28-pin, 5-mm × 5 mmQFN package.
Documents
Technical documentation and resources