DS2711 查看數據表（PDF） - Maxim Integrated

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DS2711

Loose-Cell NiMH Chargers

Maxim Integrated 

DS2711/DS2712: Loose-Cell NiMH Chargers

PARAMETER

Charge Timer Accuracy

Charge Timer Range

SYMBOL

CONDITIONS

RTMR = 100kΩ

tCTMR-RANGE

MIN

TYP

MAX UNITS

-5

+5

%

0.5

10

Hours

ELECTRICAL CHARACTERISTICS: TIMING (continued)

(4.0V ≤ VDD ≤ 5.5V, TA = -20°C to +70°C, unless otherwise noted.)

Note 1:

Note 2:

Note 3:

Note 4:

Note 5:

Note 6:

Note 7:

Note 8:

Voltages relative to VSS.

IMTST current is applied as a source current and as a sink current within 5ms after power-up.

When operating in two-cell-series charge configuration, the DMSEL pin must have less than 50pF of external load capacitance for

proper operation. If the load capacitance is greater than 50pF, a resistor voltage-divider should be used to maintain DMSEL at VDD/2.

Specification applicable during charge cycle with TA = 0°C to +70°C.

VBAT-MAX1 and VBAT-MAX1 are generated from the same reference. Their ranges never overlap.

VTHM-MIN, VTHM-MAX, and VTHM-STOP are fixed ratios of VDD. Their ranges never overlap.

Tested with ICSOUT = -1mA.

Gain tested with 1mV step with ICSOUT = -1mA.

Figure 1. Block Diagram

VDD

CC1

CC2

LED1

LED2

DMSEL

CTST

TMR

BIAS

3.7V

Charge

Mode

Select

UVLO

Oscillator

State Machine

Presence Test

Pre-Charge

Fast Charge

&

Cell Tests

Cell

Test

Charge

Timer

0.1V

Top-Off Charge

Maintenance Charge

SUSPEND

IPTST

Voltage

and

Temperature

Measurement

+

-

0.125V

DS2711

IPTST

VP1

VP2

VN1

THM1

THM2

VN0

VSS

CSOUT

DS2712

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