LP28400 Datasheet, PDF (8/17 Pages) Lowpower Semiconductor inc – Programmable Charge Current Up to 3000mA

VFLOAT
Fsw
VISET
IISET
VSRP-SRN-CC
VSRP-SRN-CP
TTERM_DEG
VLOWV
VLOWV_HYS
KTERM
VRECHG
TPRE-CHARGE
TFAST-CHARGE
VVREF_REG
IVREF_LIM
VREGN_REG
IREGN_LIM
RDS
RDS_BAT_OFF
RDS_BAT_ON
VBATDRV_REG
Preliminary Datasheet
LP28400
BTST, SW, SRP, SRN,
VAVCC > VUVLO,
VAVCC > VSRN, ISET >
120mV, VBAT=8.4V,
Charge done
CELL = VREF, TJ = 0°C to 85°C
Regulated Output (Float) Voltage
LP28400
CELL = GND, TJ = 0°C to 85°C
LP28400
PWM Switching Frequency
ISET Voltage Range
ISET Input Bias Current
Charge Current Full Scale
Sense Voltage
VISET=VREF
VISET=Float
VISET=AGND
Charge Current Full Scale
Sense Voltage in Pre-Charge
VISET=VREF
VISET=Float
VISET=AGND
Deglitch time
VSRN > VRECH and ICHG <
ITERM
CELL = VREF, measured on
Precharge to fast charge
SRN
transition threshold
CELL = AGND, measured
on SRN
CELL = VREF, measured on
Fast charge to precharge
SRN
hysteresis
CELL = AGND, measured
on SRN
Termination set factor
Termination of fast charge
current
Recharge Threshold, below CELL=VREF ,measured on SRN
regulation voltage
VBAT_REG-VSRN
limit,
CELL=GND, measured on SRN
Pre-Charge Timer
Fast-Charge Timer
VREF regulator voltage
VAVCC > VUVLO, No load
VREF current limit
VVREF=0V,VAVCC> VUVLO
REGN regulator voltage
VAVCC > 10 V
REGN current limit
VREGN = 0 V, VAVCC > 10V
High-Side Ron
VBS-VSW=5V
Low-Side Ron
VREGN=5V
BATFET Turn-off Resistance
VAVCC > 5V
BATFET Turn-on Resistance
VAVCC > 5V
VBATDRV_REG =VACN -
BATFET Drive Voltage
VBATDRV when VAVCC >
4.158
8.358
1.32
0
25
71
46
21
7.1
4.6
2.1
2.85
5.7
100
200
1848
22176
3.13
5
4.2
25
4.2
8.4
1.5
75
50
25
7.5
5.0
2.5
100
2.9
5.8
200
400
10%
130
260
2100
25200
3.3
40
5.3
50
100
20
4.242
8.442
1.68
VREF
-25
79
54
29
7.9
5.4
2.9
2.95
5.9
160
320
2352
28224
3.47
5.6
110
110
7
uA
V
V
MHz
V
uA
mV
mV
mV
mV
mV
mV
mS
V
V
mV
mV
mV
mV
S
S
V
mA
V
mA
mΩ
mΩ
Ω
KΩ
V
LP28400-00 Version 1.0 May.-2013 Email: [e-mail] www.lowpowersemi.com Page 8 of 17