DS2712E+ Maxim Integrated Products, DS2712E+ Datasheet - Page 9
![IC NIMH CHARGER 16TSSOP](/photos/6/56/65666/175-16-tssop_sml.jpg)
DS2712E+
Manufacturer Part Number
DS2712E+
Description
IC NIMH CHARGER 16TSSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2712Z.pdf
(15 pages)
Specifications of DS2712E+
Function
Charge Management
Battery Type
Nickel Metal Hydride (NiMH)
Voltage - Supply
4 V ~ 5.5 V
Operating Temperature
-20°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-TSSOP
Operating Supply Voltage
5.5 V
Supply Current
250 uA
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
- 20 C
Charge Safety Timers
Yes
Mounting Style
SMD/SMT
Temperature Monitoring
Yes
Uvlo Start Threshold
3.5 V
Uvlo Stop Threshold
40 mV
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
DS2711/DS2712: Loose Cell NiMH Charger
DS2712 Parallel Charge Configuration with Switch-Mode Charge Current Regulation
The example in Figure 5 uses the DS2712 to regulate charge current as a switching (buck) regulator. ICHG is set
to 2A using RSNS = 0.056Ω. The effective charge current for each cell is ICHG x 0.484 = 968mA. The CSOUT
comparator output switches OFF when the voltage across the sense resistor goes above 0.125V and back ON
when the voltage drops below 0.100V. In this mode, the operating frequency is determined primarily by the value of
the inductor, the hysteresis, the input voltage, and the voltage on the cells. In some cases, a damping network may
be required to prevent overshoot with the batteries removed.
Figure 5. PARALLEL CONFIGURATION WITH SWITCH-MODE CURRENT
REGULATION (DS2712 ONLY)
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