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ICS1735EB

ICS1735 Evaluation Board

ICS1735EB
ICS1735 Evaluation Board
General Description
Table 1
Cells 3 6 12
Battery Type 6V 12V 24V
Table 2
Cells 3 6 12 Battery Type 6V 12V 24V +V (Reg. Input) 12V 18V 30V
Setting-up for Your Application
ICS1735 Evaluation Board
Table 3: Charge Stages
Max. Fast Charge
Jumper S0
PC Board Design Considerations
Maint. Charge Duty Cycle
1 pulse, 160 rests 1 pulse, 40 rests 1 pulse, 16 rests When designing a current to voltage regulator battery charger, there are several important considerations to address before starting the design and the PC board layout. In general, linear chargers are less complex and more cost effective, but less efficient than switch mode chargers. Size or power dissipation restraints may warrant a switch mode type. For the input power supply, the charging source, and the pulse discharge power circuit, keep the physical separation between power and return (ground) to a minimum to minimize field effects, particularly if switch mode type circuits are used for the input supply and / or current source. Keep the ICS1735 and all control circuits outside the power and return loops described above. These precautions prevent fields and coupled noise from disturbing normal operation. Normal care must be exercised to minimize noise coupling and ground bounce. Prevent wires and connector locations from adding excessive resistance and inductance to both power and control circuits. When designing a printed circuit board, make sure power and control grounds and power traces are wide as practical. Locate bypass and noise reduction capacitors right at or very close to IC pins and their ground pin(s). Be sure to connect power and control grounds together at or close to the negative terminal that connects to the negative lead of the battery. Galaxy Power Incorporated wants to help create a successful battery charging solution using the ICS1735. If you need assistance from sales, technical help, or applications information please contact at our headquarters: Galaxy Power, Inc. 2500 Eisenhower Avenue Valley Forge, PA 19482 USA Phone: (610) 676-0188 Fax: (610) 676-0189
Float Charge Duty Cycle
1 pulse, 40 rests 1 pulse, 10 rests 1 pulse, 4 rests
145 min 400 min
1&2 2&3 None
The 35 minute charge time option is intended for charging a battery
Table 4: Termination Select
Termination Method Voltage slope termination Timer termination only Jumper DTSEL None 2&3
Requires additional circuitry-contact Galaxy Power
Operation
Before running evaluations with the board, ensure that the board is initialized as required.
Set S0 jumper for the desired fast charge time. Set the DTSEL jumper per Table 4 If applicable, calculate another value for R15 using the procedure described on page 1. Set the amplitude of the discharge current to be the same amplitude as the current setting of the charging source.
Visit: www.galaxypower.com for product info. and
e-mail contacts
REV 0 120800
Ordering Information
ICS1735EB / CVR
ICS1735EB
ICS1735EB AND ICS1735EB / CVR SCHEMATIC DIAGRAM
U3 N7 LM317 IN N3 470 5W IN C3 GND .047uF N5 Q1 +5V .51 +5V 1W N3 N3 R4 1k R17 R5 390 D3 R18 390 ICS1735 D4 D2 D1 1 CHG 2 DCHG 3 PFN 4 MCN 5 FCN 6CLN 7CTSEL 8VSS
VDD 15 N / U 14 XREF1 13 XREF2 12 CLS 11 TENB 10 RC 9 MRN
OUT ADJ N1
N1 R15 .75 2W R14
D5 N1 1N5822
N6 U2 OUT
C9 .1uF N1
+CUR +V + 1uF 35V 510 N2 500
R13 3k N1 Q3 2N7000 Q2 2N7000 N1 N2 (jumper)
R1 0.0 R2 0.0 R3 0.0
SD103A N2 ZD +BAT R8 C4 R6
2N3903
+5V R9 C1 .047uF + C2 4.7uF 1k C5 N3 TP1 N3 R10 24k C7 100pF 3 2 1 +5V AUX 0 3 2 1 GND N3 68k GND 30k +5V 330k R7 GND GND 0.0 ohm N3 TS
+5V S0 1 2 3 CTSEL
DTSEL (TENB) S1 C8
RESET
NOTES: N1. CVR Kit, user installs in locations provided N2. User provides / installs. (see Table 1 for Zener ZD type) N3. Galaxy Power installed component. N4. Reg. input per Table 2. N5. 5V logic level FET N6. LM340, AN7805 or equivalent N7. U3 requires Heat Sink. Component not used in this application.
ICS1735 Evaluation Board
NOTES