Master Lock XR20 Manual de Serviço descarregar pdf (Página 113)

8.3 illustrates the different charging steps and Table 8.4 provides the recommended charging

voltage per cell for different battery technologies.

Diode D1 with associated remote sense connections can be avoided with application of the high-

slew rate option. As compared to standard XR Series models, the high-slew rate option has less

output capacitance and less loading on the battery when the power supply is off. Appendix 8.6

discusses the benefits of this option.

Caution: All battery parameters presented in this section are guidelines and the

user should refer to and use manufacturer’s specifications in any battery

charging application.

A temperature detector can be applied to the modulation input to adjust the set point voltage with

temperature. In this example, the temperature sensor, integrated circuit U1, is a two terminal

device that produces a current proportional to temperature. This device, AD592, is manufactured

by Analog Devices. The temperature detector, place between terminals 21 and 25 of connector

JS1, produces a temperature dependent current. This current produces a voltage drop across the

10 K input impedance at the modulation input. Table 8.5 provides the recommended charge

voltage deviation per cell as a function of temperature.

Figure 8.3 Battery charger with temperature compensation

VMOD

P/O JS1

IO2

REF

AD592

VO1REM-

VO1REM+

VS-

VS+

JS2

VO-

VO+

MULTIPLEXER

VMOD

101

1 2 ... 108 109 110 111 112 113 114 115 116 117 118 ... 128 129

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Master Lock XR20 Manual de Serviço Página 113