BM83 datasheet(56/74 Pages) MICROCHIP

56 / 74 page

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Parameter

Min.

Typ.

Max.

Unit

Threshold voltage

—

1.6

—

These parameters are characterized, but not tested on production device.

Table 9-4. Battery Charger (1)

Parameter

Min.

Typ.

Max.

Unit

Adapter input voltage (ADAP_IN)

4.6(2)

5.0

5.5

Supply current to charger only

—

4.5

Maximum battery fast charge

current

Headroom(3) > 0.7V

(ADAP_IN = 5V)

—

350

—

Headroom = 0.3V to 0.7V

(ADAP_IN = 4.5V)

—

175(4)

—

Trickle charge voltage threshold

—

Battery charge termination current (% of fast charge

current)

—

These parameters are characterized, but not tested on production device.

It needs more time to get battery fully charged when ADAP_IN = 4.5V.

Headroom = VADAP_IN – VBAT_IN.

When VADAP_IN – VBAT_IN > 2V, the maximum fast charge current is 175 mA for thermal protection.

Table 9-5. LED Driver (1)

Parameter

Min.

Typ.

Max.

Unit

Open-drain voltage

—

3.6

Programmable current range

—

5.25

Intensity control

—

step

Current step

—

0.35

—

Power-down open-drain current

—

μA

Shutdown current

—

μA

These parameters are characterized, but not tested on production device.

Table 9-6. Audio Codec Analog-to-Digital Converter (1,4)

Parameter (Condition)

Min.

Typ.

Max.

Unit

Resolution

—

Bit

Output sample rate

—

kHz

SNR ratio(2) (at MIC or Line-In)

—

Digital gain

-54

—

4.85

Digital gain resolution

—

2 to 6

—

MIC boost gain

—

Analog gain

—

BM83

Electrical Characteristics

Preliminary Datasheet

DS70005402A-page 56

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