MAX6788TA 查看數據表（PDF） - Maxim Integrated

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MAX6788TA

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level Battery Monitors in Small TDFN and TQFN Packages

Maxim Integrated 

Low-Power, 1% Accurate, Dual-/Triple-/Quad-Level

Battery Monitors in Small TDFN and TQFN Packages

VTH+

VTH-

IN_

CLEAR

OV

tPD

tCLD

OV

Figure 5. MAX6789/MAX6790 Timing

MAX6782–MAX6785 Hysteresis

Factory-Set Hysteresis

The MAX6782–MAX6785 have factory-set hysteresis for

ease of use and reduced external parts count. For

these devices the absolute hysteresis voltage is a per-

centage of the internally generated reference. The

amount depends on the device option. “A” devices

have 0.5% hysteresis, “B” devices have 5% hysteresis,

and “C” devices have 10% hysteresis. Table 2 presents

the threshold voltages for devices with factory-set hys-

teresis. For factory-set hysteresis, connect HADJ_ to

GND.

Table 2. Typical Falling and Rising

Thresholds for MAX6782–MAX6785

(HADJ_ = GND)

DEVICE

OPTION

A

B

C

PERCENT

HYSTERESIS

(%)

0.5

5

10

FALLING

THRESHOLD

(VINF) (V)

0.6055

0.5781

0.5477

RISING

THRESHOLD

(VINR) (V)

0.6085

0.6085

0.6085

Externally Adjusted Hysteresis

The MAX6782–MAX6785 can also be configured for

externally adjustable hysteresis. Connect a resistive

divider from REF to HADJ_ and to GND (Figure 6) to set

the hysteresis voltage. The hysteresis adjustment range

is from 0.4V to VREF, and the voltage at HADJ_

(VHADJ_) must be set higher than Hysteresis

Adjustment Logic High (VHALH) (Figure 4b). Note that if

VHADJ_ is lower than Hysteresis Adjustment Logic Low

(VHALL), these devices switch back to the internal fac-

tory-set hysteresis (Figure 4a).

MAX6786/MAX6787/MAX6788 Adjustable

Hysteresis

The MAX6786/MAX6787/MAX6788 offer external hystere-

sis control through the resistive divider that monitors bat-

tery voltage. Figure 2 shows the connections for external

hysteresis. See Calculating an External Hysteresis

Resistive Divider (MAX6786/MAX6787/MAX6788) section

for more information.

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