MAX17823H电池管理芯片：高效能电动车与混合动力车电池监控

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DCIN

= +48V, T

= T

MIN

to T

MAX

, unless otherwise noted, where T

MIN

= -40°C and T

MAX

= +105°C. Typical values are at

= +25°C. Operation is with the recommended application circuit.) (Note 5)

Electrical Characteristics (continued)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

HVMUX Test-Source Current I

TSTMUX

CTSTDAC[3:0] = Fh,

< V

- 1.4V, V

= 53.5V

40 50 60

µA

CTSTDAC[3:0] = 6h,

< V

- 1.4V, V

= 53.5V

18 22.5 27

AUXIN Test-Source Current I

TSTAUXIN

CTSTDAC[3:0] = Fh,

AUXINn

< V

- 1.4V, V

= 3.3V

80 100 120

µA

CTSTDAC[3:0] = 6h,

AUXINn

< V

- 1.4V, V

= 3.3V

36 45 54

CTSTDAC[3:0] = 6h

AUXINn

> V

AGND

+ 1.4V

-54 -45 -36

CTSTDAC[3:0] = Fh,

AUXINn

> V

AGND

+ 1.4V

-120 -100 -80

DIAGNOSTIC REFERENCES

ALTREF Voltage (Note 14) V

ALTREF

DIAGSEL[2:0] = 001b 1.23 1.242 1.254 V

ALTREF Temperature

Coe󰀩cient (ΔV

ALTREF

/ΔT)

(Note 7)

ALTREF

±25 ppm/°C

PTAT Output Voltage (Note 7) V

PTAT

= 120°C 1.2 V

PTAT Temperature Coe󰀩cient

(ΔV

PTAT

/ΔT) (Note 7)

V_PTAT

3.07 mV/°C

PTAT Temperature O󰀨set

(Note 7)

OS_PTAT

0 °C

ALERTS

ALRTVDDLn Threshold V

VDDL_OC

= 3.3V 3 3.15 3.25 V

ALRTGNDLn Threshold V

GNDL_OC

AGND = 0V 0.05 0.15 0.3 V

ALRTHVUV Threshold V

HVUV

–V

DCIN

falling 3.8 4.1 4.25 V

ALRTHVOV Threshold V

HVOV

–V

DCIN

rising 7 8.5 10 V

ALRTTEMP Threshold (Note 7) T

ALRTTEMP

115 120 125 °C

ALRTTEMP Hysteresis

(Note 7)

ALRTTEMPHYS

2 °C

MAX17823H 12-Channel, High-Voltage

Data-Acquisition Systems

www.maximintegrated.com

Maxim Integrated

│

Note 5: Unless otherwise noted, limits are 100% production tested at T

= +25°C. Limits over the operating temperature range

and relevant supply voltage range are guaranteed by design and characterization.

Note 6: Maximum limited by application circuit.

Note 7: Guaranteed by design and not production tested.

Note 8: Fall time measured 90% to 10%; rise time measured 10% to 90%.

Note 9: Differential signal (V

RXP

- V

RXN

) where V

RXP

and V

RXN

do not exceed a common-mode voltage range of ±25V.

Note 10: I

SHDNL

measured with V

SHDNL

= 0.3V, STOP characters, zero idle time, V

RX_PEAK

= 3.3V

Note 11: V

CELLn

= V

- V

Cn-1

, range over which measurement settling time and accuracy is guaranteed.

Note 12: V

CELLn

= V

- V

Cn-1

, V

CELLn

= V

CELLn-1

, and V

DCIN

= 12 x │V

CELLn

│ (9V min). No oversampling enabled

(OVSAMPL[2:0] = 0). Average of 64 acquisitions.

Note 13: V

DDL

= V

DDL2

for lower port and V

DDL

= V

DDL3

for upper port.

Note 14: As measured during specified diagnostic mode.

Note 15: Not production tested. See the Cell-Balancing section for details on the maximum allowed balancing current. Duty cycle is

calculated for a 10-year device lifetime.

Note 16: Acquisition mode (ADC conversions) is entered when the SCAN bit is set and ends when SCANDONE is set. With the

typical acquisition duty cycle very low, the average current (I

DCIN

) is much less than I

DCMEAS

. Total supply current during

communication I

DCIN

= I

DCCOMM

+ I

DCSTBY

Note 17: In daisy-chain applications, the bit time of the second stop bit may be less than specified to account for clock-rate

variation and sampling error between devices.

Note 18: Charge-pump efficiency = ΔI

LOAD

/ΔI

SUPPLY

, where I

LOAD

is applied from HV to AGND, ΔI

LOAD

= 5mA, and

ΔI

SUPPLY

= I

DCIN

(for I

LOAD

= 5mA) - I

DCIN

(for I

LOAD

= 0).

DCIN

= +48V, T

= T

MIN

to T

MAX

, unless otherwise noted, where T

MIN

= -40°C and T

MAX

= +105°C. Typical values are at

= +25°C. Operation is with the recommended application circuit.) (Note 5)

Electrical Characteristics (continued)

Typical Operating Characteristics

CHARGE PER PREAMBLE BYTE

KEEP ALIVE OPERATION

MAX17823A-B DS toc01

CHARGE TRANSFERED (NANO COULOMBS)

0.200

0.400

0.600

0.800

1.000

1.200

0.000

COMMUNICATIONS VOLTAGE (VOLTS Pk)

UART = 500kbps

UART = 1Mbps

UART = 2Mbps

3.102.60 3.60

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Propagation Delay

(RX Port to TX Port)

PROP

2.5 3 t

BIT

Startup Time from SHNDL High

and V

= 0V, to RXUP/RXUN

Valid

STARTUP

1 ms

MAX17823H 12-Channel, High-Voltage

Data-Acquisition Systems

www.maximintegrated.com

Maxim Integrated

│

Pin Description

PIN NAME FUNCTION DESCRIPTION

1 N.C. N.C. Not Connected. Connect to ground or leave unconnected.

2 AGND Ground Analog Ground. Connect to negative terminal of cell 1 and ground plane.

3 SHDNL Input

Shutdown Active-Low Input. Drive > 1.8V to enable operation, and drive < 0.6V to reset

device and place in shutdown mode. +72V tolerant. If not driven externally, this input can

be controlled solely through UART communication and software control. Bypass with a 1nF

capacitor to AGND. For single-ended UART, SHDNL must be driven externally.

4 AGND Ground Analog Ground. Connect to negative terminal of cell 1 and ground plane.

5 V

Power

3.3V Regulator Output Used to Supply V

DDL1

, V

DDL2

, and V

DDL3

. Bypass with a 1µF

capacitor to ground.

6 TXUN Output Negative Output for Upper-Port Transmitter. Driven between V

DDL3

and GNDL3.

7 TXUP Output Positive Output for Upper-Port Transmitter. Driven between V

DDL3

and GNDL3.

8 GNDL1 Ground Digital Ground. Connect to ground plane.

9 V

DDL1

Power 3.3V Digital Supply. Connect externally to V

and bypass with 0.47µF capacitor to GNDL1.

10 GNDL3 Ground Ground for Upper-Port Transmitter. Connect to ground plane.

11 V

DDL

Power

3.3V Supply for Upper-Port Transmitter. Connect externally to V

and bypass with 0.47µF

capacitor to GNDL3.

12 RXUN Input Negative Input for Upper-Port Receiver. Tolerates ±30V.

13 RXUP Input

Positive Input for Upper-Port Receiver. Tolerates ±30V. Connect to ground for single-ended

operation.

14 GPIO3 I/O General-Purpose I/O 3. Driven between V

DDL1

and GNDL1. 2MΩ internal pulldown.

15 GPIO2 I/O General-Purpose I/O 2. Driven between V

DDL1

and GNDL1. 2MΩ internal pulldown.

16 GPIO1 I/O General-Purpose I/O 1. Driven between V

DDL1

and GNDL1. 2MΩ internal pulldown.

17 GPIO0 I/O General-Purpose I/O 0. Driven between V

DDL1

and GNDL1. 2MΩ internal pulldown.

18 N.C. N.C. Not Connected. Connect to ground or leave unconnected.

19 N.C. N.C. Not Connected. Connect to ground or leave unconnected.

20 TXLP Output Positive output for lower port transmitter. Driven between V

DDL2

and GNDL2.

21 TXLN Output Negative Output for Lower-Port Transmitter. Driven between V

DDL2

and GNDL2.

22 V

DDL2

Power

3.3V Supply for Lower-Port Transmitter. Connect externally to V

and bypass with 0.47µF

capacitor to GNDL2.

23 GNDL2 Ground Ground for Lower-Port Transmitter. Connect to ground plane.

24 RXLP Input

Positive Input for Lower-Port Receiver. Tolerates ±30V. Connect to ground for single-ended

operation.

MAX17823H 12-Channel, High-Voltage

Data-Acquisition Systems

www.maximintegrated.com

Maxim Integrated

│

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