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LTC3335 Datasheet(PDF) 7 Page - Analog Devices

Part # LTC3335
Description  Wireless Power Receiver and 400mA Buck Battery Charger
PDF  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC3335 Datasheet(HTML) 7 Page - Analog Devices

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LTC4120/LTC4120-4.2
7
Rev. G
For more information www.analog.com
Switching Frequency
vs Temperature
Buck Efficiency vs Battery Current
TEMPERATURE (°C)
–50
0.8
1.0
1.4
25
75
4120 G07
0.6
–25
0
50
100
125
0.4
0.2
0
1.2
FREQ = GND
FREQ = GND
FREQ = INTVCC
FREQ = INTVCC
2 UNITS TESTED
IBAT (mA)
0
75
80
85
400
4120 G08
70
65
60
50
100
200
300
50
150
250
350
55
95
90
VIN = 12.5V
VIN = 14V
VIN = 20V
VIN = 30V
LSW = 68µH, SLF12555T-680M1R3
FREQ = GND
VBAT = 4.2V
Burst Mode Trigger Current
Typical Burst Mode Waveforms,
IBAT = 38mA
Typical tMIN(ON) vs Temperature
TYPICAL PERFORMANCE CHARACTERISTICS
Wireless Power Transfer Efficiency,
VIN_RX vs Battery Current
BAT Pin Leakage Current/VBAT-VIN
vs Temperature
Typical Wireless Charging Cycle
TA = 25°C, unless otherwise noted.
TEMPERATURE (°C)
–50
14
25
4120 G09
8
4
–25
0
50
2
0
16
12
10
6
350
200
100
50
0
400
300
250
150
75
100 125
IBAT
IBAT
VBAT-VIN
VBAT-VIN
2 UNITS TESTED
VIN = OPEN-CIRCUIT
VBAT = 4.2V
TEMPERATURE (°C)
–50
80
85
95
100
105
130
115
0
50
75
100
4120 G10
90
120
125
110
–22
25
125
2 UNITS TESTED
IBAT (mA)
0
50
60
70
200
4120 G11
40
30
50
100
150
250
20
10
0
20
22
24
18
16
14
12
10
9mm EFFICIENCY
10mm EFFICIENCY
11mm EFFICIENCY
9mm V_RX
10mm V_RX
11mm V_RX
VFLOAT = 8.3V
LSW = SLF6028-470MR59
RPROG = 4.64k
TIME (HOURS)
0
0
50
150
200
250
450
4120 G12
100
2
1
3
300
350
400
0
0.5
1.5
2.0
2.5
4.5
1.0
3.0
3.5
4.0
VCHRG
VBAT
IBAT
BAT = 940mAhr
LSW = TDK SLF4075 15µH
RFB1 = 732k, RFB2 = 976k
RPROG = 3.01k
APPLICATION CCT OF FIGURE 10
SPACING = 14mm
VIN (V)
10
0
10
30
40
50
30
90
4120 G13
20
20
15
35
25
40
60
70
80
RPROG = 6.2k
RPROG = 3k
VSW
5V/DIV
VPROG
500mV/DIV
ILSW
200mA/DIV 0mA
0V
0V
4µs/DIV
4120 G14



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