Battery Interface Circuit - Nokia 6265 Baseband Description And Troubleshooting

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Battery Interface Circuit

Figure 50 illustrates the battery interface circuit. The BSI voltage level for different
power-up modes:
• normal mode - 1.23V
• test mode - 170mV
• local mode - 90mV
The UEMEK has the following programmable charge cut-off limits:
• VBATLim1=3.6 V (Default)
• VBATLim2L=5.0 V
• VBATLim2H=5.25 V
When the voltage rises above VBATLim1, 2L, 2H+ charging stops. No change is done in
operational mode. When the voltage decreases below VBATLim-, charging restarts.
The duty cycle range is 0% to 100%. The maximum charging current is limited to 1.2 A.
Issue 1 11/2005
BSI voltage level
Figure 50: Battery interface circuit
©2005 Nokia Corporation
6265/6265i/6268 (RM-66)
Baseband Description and Troubleshooting
Company Confidential Page 49