TI bq76pl536：锂离子电池监控及电动车用高效保护IC

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TI bq76pl536是一款专为电动汽车（EV）和混合动力汽车（HEV）应用设计的3到6系列锂离子电池监控和二级保护集成电路。该芯片的主要特点包括： 1. **不间断电源系统（UPS）支持**：bq76pl536能够提供连续的电力供应，确保在电池组断电时，系统仍能保持运行。 2. **多化学系列兼容**：这款IC适用于3到6系列的多种锂离子电池，包括不同化学成分的电池，确保了广泛的应用范围。 3. **电动自行车和电动滑板车**：它能够为这些便携式设备的电池管理提供高效保护。 4. **热插拔设计**：允许用户在不中断系统的情况下更换电池，提高了维护灵活性。 5. **大型电池系统支持**：适用于需要大容量电池系统的应用，如无人机、储能设备等。 6. **高速SPI接口**：通过串行外围接口（SPI）实现数据通信，确保快速、高效的电池状态传输。 7. **电动汽车和混合动力车辆应用**：作为关键组件，用于监控和保护这些车辆的动力电池。 8. **堆栈式垂直接口**：设计灵活，可以与其他类似模块组合使用，节省空间并简化系统布局。 9. **无隔离组件需求**：减少了外部元件，简化了电路设计，降低成本。 10. **强大的模拟前端功能**：集成高精度的14位模拟数字转换器（ADC），具有±3mV的典型精度和6微秒的转换时间，确保电池电压和温度的精确测量。 11. **独立的电池保护**：包括独立的细胞电压和温度保护，以及细胞平衡功能，确保电池组的健康和安全性。 12. **5V精密稳压器**：为用户电路提供稳定的电源，保证电子设备的正常工作。 bq76pl536是电动汽车和混合动力汽车电池管理系统中的关键器件，其集成性和高效性能使其成为这类应用的理想选择。它的工业级温度范围和多方面的保护特性，使得它在满足严苛环境条件下也能可靠工作。

bq76PL536

SLUSA08A –DECEMBER 2009–REVISED JULY 2010

www.ti.com

TSn Measurement

Typical values stated where T

= 25°C and BAT = 20V, Min/Max values stated where T

= –40˚C to 85°C and BAT = 7.2V to

27V (unless otherwise noted), FUNCTION_CONFIG[]=01xxxx00b for all Test Conditions

PARAMETER TEST CONDITION MIN TYP MAX UNIT

Input voltage range,

(1)

TSn+ TSn– 0 2.5 V

14 bits, REG50 = 5 V,

RES

Voltage resolution,

(2)

~153 µV

(Resolution ≈ V

REG50

)

ACC

Ratio accuracy, % of input

(2)

0.25 V ≤ V

≤ 2.5 V –0.25% ±0.1% 0.25%

Input capacitance

(3)

Converting 40 pF

Effective input resistance

(3)

Converting 50 kΩ

Noise

(3)

<150 µV

RMS

(1) 0 V may not lie within the range of measured values due to offset voltage limit and device calibration.

(2) See text for specific conversion formula.

(3) Specified by design, not measured in production

THERMAL SHUTDOWN

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Shutdown threshold

(1)

BAT = 20 V 125 142 156 °C

HYS

Recovery hysteresis

(1)

8 25 °C

(1) Specified by design, not measured in production.

UNDERVOLTAGE LOCKOUT (UVLO) and POWER-ON RESET (POR)

Typical values stated where T

= 25°C and BAT = 20 V, Min/Max values stated where T

= –40˚C to 85°C and BAT = 7.2 V

to 27 V (unless otherwise noted)

PARAMETER TEST CONDITION MIN NOM MAX UNIT

UVLO

Negative-going threshold 5 5.6 V

UVLO_HSY

Hysteresis 250 375 500 mV

UVLO

DELAY

Delay to locked-out condition V ≤ V

UVLO

MIN 15 ms

POR

Negative-going threshold 4 5 V

POR_HSY

Hysteresis 250 500 750 mV

POR

DELAY

Delay to disabled condition V ≤ V

POR

MIN 15 µs

RST

Reset delay time V ≥ V

POR

+ V

POR_HSY

40 56 70 ms

Product Folder Link(s) :bq76PL536

bq76PL536

www.ti.com

SLUSA08A –DECEMBER 2009–REVISED JULY 2010

BATTERY PROTECTION THRESHOLDS

Typical values stated where T

= 25°C and BAT = 20 V, Min/Max values stated where T

= –40˚C to 85°C and BAT = 7.2 V

to 27 V (unless otherwise noted)

PARAMETER TEST CONDITION MIN NOM MAX UNIT

OVR

OV detection threshold range

(1)

2 5 V

ΔV

OVS

OV detection threshold program step 50 mV

OVH

OV detection hysteresis 50 mV

OVA1

OV detection threshold accuracy 3.3 ≤ V

OV_SET

≤ 4.5 –50 0 50 mV

OVA2

OV detection threshold accuracy V

OV_SET

< 3.3 or V

OV_SET

> 4.5 –70 0 70 mV

UVR

UV detection threshold range

(1)

700 3300 mV

ΔV

UVS

UV detection threshold program step 100 mV

UVH

UV detection hysteresis 100 mV

UVA

UV detection threshold accuracy –100 0 100 mV

OTR

OT detection threshold range

(2)

REG50

= 5 V 1 2 V

VOTS

OT detection threshold program step

(2)

See

(3)

OTA

OT detection threshold accuracy

(2)

T = 40°C to 90°C 0.04 0.05 V

ΔV

OTH

OT reset hysteresis T = 40°C to 90°C 8% 12% 15%

(1) COV and CUV thresholds must be set such that COV – CUV ≥ 300 mV

(2) Using recommended components. Consult Table 2 in text for voltage levels used.

(3) See Table 2 for trip points.

BATTERY PROTECTION DELAY TIMES

Typical values stated where T

= 25°C and BAT = 20 V, Min/Max values stated where T

= –40˚C to 85°C and BAT = 7.2 V

to 27 V (unless otherwise noted)

PARAMETER TEST CONDITION MIN NOM MAX UNIT

OV detection delay-time range 0 3200 ms

COVT [µs/ms] = 0 100 µs

Δt

OV detection delay-time step

COVT [µs/ms] = 1 100 ms

UV detection delay-time range 0 3200 ms

CUVT[7] (µs/ms) = 0 100 µs

Δt

UV detection delay-time step

CUVT[7] (µs/ms) = 1 100 ms

OT detection delay-time range 0 2550 ms

Δt

OT detection delay-ime step 10 ms

OV, UV, and OT detection delay-time

acr

CUVT, (COVT) ≥ 500µs –12% 0% 10%

accuracy

(1)

or V

threshold exceeded by

(DETECT)

Protection comparator detection time 100 µs

10 mV

(1) Under double or multiple fault conditions (of a single type), the second or greater fault may have its delay time shortened by up to the

step time for the fault. I.e. the second and subsequent COV faults occurring within the delay time period for the first fault may have their

delay time shortened by up to 100 µs.

OTP EPROM PROGRAMMING CHARACTERISTICS

Typical values stated where T

= 25°C and BAT = 20 V, Min/Max values stated where T

= –40˚C to 85°C and BAT = 7.2 V

to 27 V (unless otherwise noted)

PARAMETER TEST CONDITION MIN NOM MAX UNIT

PROG

Programming voltage 6.3 7 7.7 V

PROG

Programming time V

BAT

≥ 20V 1500

(1)

2200 ms

PROG

Programming current 10 20 mA

(1) The write pulse is self-timed internally. V

PROG

should be applied for this time at a minimum.

Product Folder Link(s) :bq76PL536

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