Datasheet

( )
DPM DPM_1
VDPM
DPM
VBUS_ VBUS_
R =
KVBUS_
-
ISE T
ISET
O UT
K
R =
I
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1.4 Jumper Settings
Table 2. Jumper Settings
Jack Description Factory Setting
JP1 Programs the fast-charge current setting. 500 mA when JP1 ON; external setting Jumper OFF (external setting)
when JP1 OFF
JP2 Connect /EN and /PG together when JP2 ON to enable charger when power present Jumper OFF (external /EN)
JP3 Programs the input voltage regulation threshold. 4.5V when JP3 ON; external setting Jumper OFF (external setting)
when JP3 OFF.
JP4 Limited power charge mode (LPCM) when JP4 ON; normal operation when JP4 OFF Jumper OFF (normal operation)
JP5 Select external TS input or internal TS setting Jumper ON 1-2 (external TS)
1-2 : External TS input
2-3 : Internal TS setting
JP6 The pullup power source supplies for the LEDs Jumper ON 2-3 (VBUS)
1-2 : BAT
2-3 : VBUS
JP7 Charger EN / MODE Jumper ON 1-2 (charger OFF /
1-2 : OFF/HIGH MODE High)
2-3 : ON/LOW
1.5 Recommended Operating Conditions
Table 3. Recommended Operating Conditions
Description Min Typ Max Unit Notes
Supply voltage, V
BUS
Input voltage 4.5 7.3 V
Battery voltage, V
BAT
Voltage applied at VBAT terminal of J2 0 4.2 V
Supply current Maximum input current 0 0.8 A
Charge current, I
chrg
Battery charge current 0 0.8 A
Operating junction temperature 0 125 °C
range, T
J
An external resistor is used to program the VBUS_DPM. The programming resistor, R
VDPM
is dictated by
the following equation:
(1)
Where:
VBUS_
DPM
is the desired input voltage regulation voltage threshold.
VBUS_
DPM_1
is the built-in offset threshold, nominally 3.5 V.
K
VBUS_DPM
is a gain factor found in the electrical specification.
If VDPM pin is shorted to VSS; the VBUS_
DPM
must be clamped to 3.65 V.
If the VDPM pin is floated (open circuit), the IC operates in Battery Tracking mode. In this case, VBUS
DPM threshold is internally set as V
TRK
, which is BAT + 100 mV.(BAT > 3.65 V) or 3.75 V (BAT ≤ 3.4
V).
Connecting JP3 set 4.5 V VDPM on EVM.
An external resistor is used to program the output current (50-800 mA). The equation for charge current is:
(2)
Where, I
OUT
is the desired fast-charge current; K
ISET
is a gain factor found in the specification.
The termination and precharge current are internally set at 10% and 20% of fast-charge current,
respectively. The precharge-to-fast-charge, V
lowv
threshold is set to 2.5 V.
Connecting JP1 set 500 mADC for fast-charge current and 100 mADC for precharge current on EVM.
3
SLUU477A– December 2010– Revised August 2011 800-mA, Single-Input, Single-Cell, Li-Ion Battery Solar Charger With Power Path
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