BQ2461x：独立锂离子/聚合物电池充电器，同步开关模式，低功耗设计

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BQ24610是一款专为锂离子（Li-ion）或锂聚合物（Li-Polymer）电池设计的独立同步开关模式充电器，它结合了系统电源选择器和低功耗特性。这款充电器的核心特点是： 1. **充电状态指示**：通过ChargeEnable Pin，用户可以监测充电过程的状态，确保安全和效率。 2. **高效转换器**：采用600-kHz NMOS-NMOS同步降压（Buck）转换器，提供高效的电力转换，降低能耗。 3. **高级驱动功能**：6-V Gate Drive支持，使得同步转换器的驱动更稳定，能实现高达99.5%的最高有效 duty cycle，有助于快速且准确地为电池充电。 4. **宽输入电压范围**：BQ24610适用于5-V到28-V的VCC输入，BQ24617则支持5-V到24-V，可适应多种应用场景的需求。 5. **超低待机模式**：在关断状态下，电池放电电流极低，BQ24610小于15 µA，BQ24617更是低至1.5 mA，这有助于延长电池寿命并节省能源。 6. **系统集成能力**：内置系统电源选择器，可以根据需要选择电池组或外部电源供电，增加了灵活性。 7. **大电流支持**：最大充电电流可达10 A，同时兼容1到6节电池（BQ24610）或1到5节电池（BQ24617），满足不同容量的电池需求。 8. **高精度电压和电流控制**：确保充电过程中的精确控制，以维持电池的最佳工作状态。 9. **低功耗设计**：符合Energy Star标准，具有低静止输入电流，即使在不工作时也能减少对电网的消耗。这款充电器广泛应用于需要高性能、高效率和低功耗的便携式电子设备，如移动电源、平板电脑、智能手机、无人机等。文档包括产品目录、样本获取、技术文档、工具与软件、支持服务以及社区资源，为用户提供全面的技术支持和应用解决方案。文档版本为SLUS892C，发布日期跨越2009年12月至2015年4月，说明其具有一定的历史参考价值和持续的技术更新。

bq24610

bq24617

SLUS892C –DECEMBER 2009–REVISED APRIL 2015

www.ti.com

Electrical Characteristics (continued)

5 V ≤ V

VCC

≤ 28 V, 0°C < T

< 125°C, typical values are at T

= 25°C, with respect to GND (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

ITERM

= 20 mV –4% 4%

Termination current accuracy V

ITERM

= 5 mV –25% 25%

ITERM

= 1.5 mV –45% 45%

Deglitch time for termination (both

100 ms

edge)

QUAL

Termination qualification time V

BAT

> V

RECH

and I

CHG

TERM

250 ms

QUAL

Termination qualification current Discharge current once termination is detected 2 mA

INPUT CURRENT REGULATION

ACSET

ACSET voltage range 2 V

ACP-ACN current-sense voltage

IREG_DPM

= V

ACP

– V

ACN

100 mV

range

Input current set factor (amps of

ACSET

input current per volt on ACSET R

SENSE

= 10 mΩ 5 A/V

pin)

IREG_DPM

= 40 mV –3% 3%

Input current regulation accuracy

ACSET

IREG_DPM

= 20 mV –4% 4%

leakage current in to ACSET pin

IREG_DPM

= 5 mV –25% 25%

ISET1

Leakage current in to ACSET pin V

ACSET

= 2 V 100 nA

INPUT UNDERVOLTAGE LOCKOUT COMPARATOR (UVLO)

UVLO

AC undervoltage rising threshold Measure on VCC 3.65 3.85 4 V

UVLO_HYS

AC undervoltage hysteresis, falling 350 mV

VCC LOWV COMPARATOR

Falling threshold, disable charge Measure on VCC 4.1 V

Rising threshold, resume charge 4.35 4.5 V

SLEEP COMPARATOR (REVERSE DISCHARGING PROTECTION)

SLEEP _FALL

SLEEP falling threshold V

VCC

– V

SRN

to enter SLEEP 40 100 150 mV

SLEEP_HYS

SLEEP hysteresis 500 mV

SLEEP rising delay VCC falling below SRN, delay to turn off ACFET 1 μs

SLEEP falling delay VCC rising above SRN, delay to turn on ACFET 30 μs

VCC falling below SRN, delay to enter SLEEP

SLEEP rising shutdown deglitch 100 ms

mode

VCC rising above SRN, delay to exit SLEEP

SLEEP falling power-up deglitch 30 ms

mode

ACN / SRN COMPARATOR

ACN-SRN_FALL

ACN to SRN falling threshold V

ACN

– V

SRN

to turn on BATFET 100 200 310 mV

ACN-SRN_HYS

ACN to SRN rising hysteresis 100 mV

ACN to SRN rising deglitch V

ACN

– V

SRN

> V

ACN-SRN_RISE

2 ms

ACN to SRN falling deglitch V

ACN

– V

SRN

< V

ACN-SRN_FALL

50 μs

BAT LOWV COMPARATOR

Precharge to fast-charge transition

LOWV

Measured on VFB pin, rising 1.534 1.55 1.566 V

(LOWV threshold)

LOWV_HYS

LOWV hysteresis 100 mV

LOWV rising deglitch VFB falling below V

LOWV

25 ms

LOWV falling deglitch VFB rising above V

LOWV

+ V

LOWV_HYS

25 ms

RECHARGE COMPARATOR

Recharge threshold (with-respect-

RECHG

Measured on VFB pin, falling 35 50 65 mV

to V

REG

)

Recharge rising deglitch VFB decreasing below V

RECHG

10 ms

Recharge falling deglitch VFB decreasing above V

RECHG

10 ms

Product Folder Links: bq24610 bq24617

bq24610

bq24617

www.ti.com

SLUS892C –DECEMBER 2009–REVISED APRIL 2015

Electrical Characteristics (continued)

5 V ≤ V

VCC

≤ 28 V, 0°C < T

< 125°C, typical values are at T

= 25°C, with respect to GND (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

BAT OVERVOLTAGE COMPARATOR

OV_RISE

Overvoltage rising threshold As percentage of V

104%

OV_FALL

Overvoltage falling threshold As percentage of V

102%

INPUT OVERVOLTAGE COMPARATOR (ACOV)

AC overvoltage rising threshold on

ACOV

31.04 32 32.96 V

VCC (bq24610)

AC overvoltage falling hysteresis

ACOV_HYS

1 V

(bq24610)

AC overvoltage rising threshold on

ACOV

25.22 26 26.78 V

VCC (bq24617)

AC overvoltage falling

ACOV_HYS

820 mV

hysteresis(bq24617)

AC overvoltage deglitch (both

Delay to changing the STAT pins 1 ms

edge)

AC overvoltage rising deglitch Delay to disable charge 1 ms

AC overvoltage falling deglitch Delay to resume charge 20 ms

THERMAL SHUTDOWN COMPARATOR

Thermal shutdown rising

SHUT

Temperature increasing 145 °C

temperature

SHUT_HYS

Thermal shutdown hysteresis 15 °C

Thermal shutdown rising deglitch Temperature increasing 100 μs

Thermal shutdown falling deglitch Temperature decreasing 10 ms

THERMISTOR COMPARATOR

LTF

Cold temperature rising threshold As Percentage to V

VREF

72.5% 73.5% 74.5%

LTF_HYS

Rising hysteresis As Percentage to V

VREF

0.2% 0.4% 0.6%

HTF

Hot temperature rising threshold As Percentage to V

VREF

36.2% 37% 37.8%

TCO

Cut-off temperature rising threshold As Percentage to V

VREF

33.7% 34.4% 35.1%

Deglitch time for temperature out-

> V

LTF

, or V

< V

TCO

, or V

< V

HTF

400 ms

of-range detection

Deglitch time for temperature in- V

< V

LTF

– V

LTF_HYS

or V

TCO

, or V

20 ms

valid-range detection V

HTF

CHARGE OVERCURRENT COMPARATOR (CYCLE-BY-CYCLE)

Current rising, in nonsynchronous mode,

45.5 mV

mesure on V

(SRP-SRN)

, V

SRP

< 2 V

Charge overcurrent falling

threshold

Current rising, as percentage of V

(IREG_CHG)

, in

160%

synchronous mode, V

SRP

> 2.2 V

Minimum OCP threshold in synchronous mode,

Charge overcurrent threshold floor 50 mV

measure on V

(SRP-SRN)

, V

SRP

> 2.2 V

Charge overcurrent threshold Maximum OCP threshold in synchronous mode,

180 mV

ceiling measure on V

(SRP-SRN)

, V

SRP

> 2.2 V

CHARGE UNDERCURRENT COMPARATOR (CYCLE-BY-CYCLE)

Charge undercurrent falling Switch from SYNCH to NON-SYNCH, V

SRP

ISYNSET

1 5 9 mV

threshold 2.2 V

BATTERY SHORTED COMPARATOR (BATSHORT)

BAT short falling threshold, forced

BATSHT

SRP

falling 2 V

nonsynchronous mode

BATSHT_HYS

BAT short rising hysteresis 200 mV

BATSHT_DEG

Deglitch on both edge 1 μs

Product Folder Links: bq24610 bq24617

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