MAX1647EAP Maxim Integrated Products, MAX1647EAP Datasheet - Page 18
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MAX1647EAP
Manufacturer Part Number
MAX1647EAP
Description
Battery Charger Lead-Acid/Li-Ion/NiCD/NiMH 4000mA 18V 20-Pin SSOP
Manufacturer
Maxim Integrated Products
Type
Battery Chargerr
Datasheet
1.MAX1647EAP.pdf
(25 pages)
Specifications of MAX1647EAP
Package
20SSOP
Battery Type
Lead-Acid|Li-Ion|NiCD|NiMH
Operating Supply Voltage
7.5 to 28 V
Output Current
4000 mA
Output Voltage
18(Max) V
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Company
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Manufacturer
Quantity
Price
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Part Number:
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Manufacturer:
MAXIM
Quantity:
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Part Number:
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Manufacturer:
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Company:
Part Number:
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210
Figure 8 shows the mapping between V0 (the voltage-
regulation-loop set point) and the ChargingVoltage( )
data.
The power-on reset value for the ChargingVoltage( )
register is 0xFFF0; thus, the first time a MAX1647 is
powered on, the BATT voltage regulates to 16.368V
with V
status bit is clear, the ChargingVoltage( ) register
returns to its power-on reset state.
Chemistry-Independent Battery Chargers
Figure 8. ChargingVoltage( ) Data to Voltage Mapping
18
______________________________________________________________________________________
REF
= 4.096V. Any time the BATTERY_PRESENT
12.592
16.368
0b000000000000xxxx
8.400
4.192
0
0x000x
V
REF
= 4.096V
0b000100000110xxxx
0x106x
0b001000001101xxxx
ChargingVoltage( ) D15–D0 DATA
0x20Dx
The ChargingCurrent( ) command uses Write-Word
protocol. The command code for ChargingCurrent( ) is
0x14; thus, the CMD7–CMD0 bits in Write-Word proto-
col should be 0b00010100. The 16-bit binary number
formed by D15–D0 represents the current-limit set point
(I0) in milliamps. Tying SEL to AGND selects a 1.023A
maximum setting for I0. Leaving SEL open selects a
2.047A maximum setting for I0. Tying SEL to VL selects
a 4.095A maximum setting for I0.
0b001100010011xxxx
0x313x
0b001111111111xxxx
0x3FFx
0b111111111111xxxx
ChargingCurrent( )
0xFFFx