Datenblatt-Suchmaschine für elektronische Bauteile |
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SS6782G Datenblatt(PDF) 11 Page - Silicon Standard Corp. |
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SS6782G Datenblatt(HTML) 11 Page - Silicon Standard Corp. |
11 / 19 page www.SiliconStandard.com 11 of 19 SS6782G 9/21/2005 Rev.3.01 ABV/BBV Range and Temperature Protection once every 8 seconds, which is also determined by the safety timer. The acceptable battery voltage range of ABV and BBV pins and the mode of temperature protection function is determined by the voltage of the SEL3 pin, shown as the following: The - ∆V detection and peak voltage timer (0 ∆V) functions can be disabled if the MODE pin is biased to GND. The ∆ T/∆ t function can be disabled if the voltage of the ADJ pin is higher than (Vcc-0.3V). (a) SEL3 > VCC - 0.3V Acceptable ABV/BBV Range: Before initial timer: 0.16V~2.7V After initial timer: 0.69V~2.7V Maximum Safety Timer Cutoff The maximum fast charge period is determined by the safety timer, which is set by a resistor connected from TMR pin to GND. Safety timer, - ∆V sampling rate, and ∆ ∆ T/ t sampling rate will be longer if the resistor value is larger. When the value of the resistor is 100k Ω, the safety timer period equals 80 minutes. This can be verified by biasing the MODE pin to VCC and the measured frequency on DSW pin should be around 32.8 KHz. After the safety timer period is finished, the fast charge action is terminated. Temperature Protection Mode: Enters charging-suspended mode when tem- perature is either too low or too high, same as abnormal battery voltage. Latch for charge- suspending function is provided for high tem- perature protection, but not for low temperature protection. (b) VCC - 1.4V> SEL3 > V 2 cc - 0.4V Acceptable ABV/BBV Range: Before initial timer: 0.16V~2.7V Maximum Voltage and Temperature Cutoff After initial timer: 0.69V~2.7V The SS6782G guards against the maximum lim- its for battery voltage and temperature during fast charging. If either of these limits is ex- ceeded, fast charge action is terminated. Temperature Protection Mode: If temperature is too high, battery charging is regarded as completed. If temperature is too low, function of ∆ detection is disabled, just as if the thermistor did not exist. ∆ T/ t Trickle Charge (c) V 2 cc - 0.4V>SEL3 >1.4V There are five different selectable duty cycles for trickle charging after fast charging to pre- vent the loss of charge due to battery self- discharging. The setting of SEL1 and SEL2 pins controls the duty cycle . This function can only be activated in the following three situations: Acceptable ABV/BBV Range: Before initial timer: 0.16V~2 V After initial timer: 1.2V~2V Temperature Protection Mode: Battery pack A is fully charged and battery pack B is abnormal. Enters the charging-suspended mode when temperature is too low or too high, same as abnormal battery voltage. Latch for charging-suspended function is provided for high temperature protection, but not for low temperature protection. Battery pack B is fully charged and battery pack A is abnormal. Battery pack A and B are both fully charged. DESIGN GUIDE |
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Ähnliche Beschreibung - SS6782G |
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