DEMO MANUAL DC101
SMART BATTERY CHARGER
PARTS LIST
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DESIGNATOR | QUANTITY | PART NUMBER | DESCRIPTION | VENDOR | TELEPHONE |
R5, R6, R14 | 3 | 330Ω 1/8W 5% Resistor | AVX | (803) | |
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R7 | 1 | 33.2k 1/8W 1% Resistor | Beckman | (714) | |
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R8 | 1 | 0.033Ω 1/2W 5% Resistor | IRC | (512) | |
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R9 | 1 | 100k 1/8W 5% Resistor | AVX | (803) | |
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R10 | 1 | 0.05Ω 1/2W 5% Resistor | IRC | (512) | |
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R11 | 1 | 510Ω 1/8W 5% Resistor | AVX | (803) | |
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R12 | 1 | 100k 1/8W 0.1% Resistor | IRC | (512) | |
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R13 | 1 | 143k 1/10W 0.1% Resistor | IRC | (512) | |
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R15 | 1 | 21.5k 1/10W 0.1% Resistor | IRC | (512) | |
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R17 | 1 | 1.05k 1/8W 1% Resistor | AVX | (803) | |
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R19, R20 | 2 | 200Ω 1/8W 1% Resistor | AVX | (803) | |
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R21, R22, R25 | 3 | 22k 1/10W 5% Resistor | AVX | (803) | |
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R23 | 1 | 22Ω 1/10W 5% Resistor | AVX | (803) | |
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R24, R26 | 2 | 10k 1/8W 5% Resistor | Dale | (605) | |
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S1 | 1 | MJTP1230 | PB Switch | (617) | |
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TP1 to TP5, E1 to E7 | 12 | Turret Testpoint | Keystone | (718) | |
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U1 | 1 | Microcontroller IC | Microchip | (602) | |
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U2 | 1 | LT1511 | Battery Charger IC | LTC | (408) |
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U3 | 1 | Voltage Regulator IC | LTC | (408) | |
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XU1 | 1 | Sockets IC | Comm Con | (818) | |
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Y1 | 1 | 4MHz Crystal | Epson (USA) | (310) |
OPERATIOU
Input Voltage: The nominal input voltage of the board is 24V DC. The input voltage must be higher than the battery voltage by a minimum of 3V. The minimum input voltage is 16V, limited by the undervoltage lockout circuit in the LT1511 and set by resistors R16, R17 and R18. The highest input voltage is 27.4V, limited by the maximum input voltage of the LT1511. The input is protected against reverse polarity up to 30V.
Input Current: The sum of the system current and the charger input current is limited by the LT1511 to 2A. When both the system current and the charger input current requirements are high, the charger reduces the charging current to meet the 2A current limit.
Red LED: A red LED indicates SMBus activity. It lights up for about 1 second when the charger recognizes its own address (12 hex) on the SMBus.
Green LED: A flashing green LED indicates microproces- sor activity and charger status. Fast blinking (approxi- mately 8Hz) indicates normal microprocessor activity and either trickle charge or shutdown charger status. After valid voltage and current data have been received, the blinking speed of the LED slows down to about 2Hz, indicating normal charging.
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