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KA35S280 Fiches technique(PDF) 5 Page - Kasin Electronics Corporation |
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KA35S280 Fiches technique(HTML) 5 Page - Kasin Electronics Corporation |
5 / 19 page KA35S280/281 Lead-Acid Battery Charger 2011 Nov 18 © 2011 Kasin Technology Inc. 5 - Pin Configuration - Mode selection pins The KA35S28X can be programmed into 3 different charge algorithm named as 3-step voltage, current and pulsed current by mode selection pins. Table 3 shows the relations between MS0/MS1 selection pins and IC operation. Table 3 – Mode Selection pins MS1 MS0 Mode Description 0 0 0 Charge is disabled 0 1 1 3-step voltage charge 1 0 2 Current charge 1 1 3 Pulsed current Charge - Faster charge pin The faster charge pin can be change internal DC voltage threshold of max current by 25% (50mV). In normal condition it is configured to 200mV by internal voltage reference generator unit. Table 4 – Mode Selection pins Faster Pin Description 0 Charge current increased by 25% 1 Normal current charge - Cyclic/Float use pin Due to recent design breakthroughs, the same battery may be used in either cyclic or standby applications and it is necessary to set the charge voltage according to it. Inaccurate voltage settings cause over- or under-charge. In applications where standby power is required to operate when the power has been interrupted, continuous float charging is recommended. Non-continuous cyclic charging is used primarily with portable equipment where charging on an intermittent basis is appropriate. The cyclic/float pin can be change internal charge reference voltage and method of temperature compensation. Table 5 – Mode Selection pins Cyclic/Float Pin Description 0 In cyclic use 1 In float use - Fixed and Configurable Thresholds The KA35S28X uses the following fixed thresholds: VMAX High-Cutoff Voltage: VBAT rising above this level is interpreted as battery removal, cutting off charging current. VMAX = 0.6 * VCC. VMIN Low-Cutoff Voltage: VBAT dropping below this level is interpreted as battery removal, cutting off charging current. VMIN = 0.2 * VCC. VTH Minimum Voltage: Used in pre-charge qualification. VTH = 0.34 * VCC. ICOND Conditioning Current: Used in the maintenance phase of the Current algorithm and pre-charge qualification. ICOND = IMAX/5. IMAX is set by Equation 2. Also the KA35S28X uses the following configurable thresholds: VBLK Upper voltage limit during fast charge, typically specified by the battery manufacturers to be 2.3V in float and 2.45 in cyclic applications per cell @ 25°C. KA35S28X uses 2.45V for VBLK when Cyclic/Float pin is set 0. VFLT Minimum charge voltage required to compensate for the battery’s self-discharge rate and maintain full charge on the battery. |
Numéro de pièce similaire - KA35S280 |
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Description similaire - KA35S280 |
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