Texas Instruments BQ24765 Evaluation Module for SMBus Controlled Battery Charger with Integrated FETs BQ24765EVM BQ24765EVM 데이터 시트
제품 코드
BQ24765EVM
SLUS999 – NOVEMBER 2009
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
7.0 V
≤
V(DCINA)
≤
24 V, 0°C < T
J
< +125°C, typical values are at T
A
= 25°C, with respect to AGND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DCIN INPUT UNDERVOLTAGE LOCK-OUT COMPARATOR (UVLO)
V
DCIN_UVLO
DCINA undervoltage rising
Measure on DCINA pin
3.5
4
4.5
V
threshold
V
DCIN_UVLO_HYS
DCINA undervoltage hysteresis,
260
mV
falling
INPUT CURRENT COMPARATOR
AC low power mode comparator
On ICREF
V
ICCOMP_OFFSET
–8
8
mV
offset voltage
THERMAL SHUTDOWN COMPARATOR
Thermal shutdown threshold with
T
SHUT
Temperature rising
155
rising temperature
°C
T
SHUT_HYS
Thermal shutdown hysteresis,
Temperature falling
20
falling
PWM HIGH SIDE POWER MOSFET
V
BOOT
– V
PHASE
= 5.5 V, Drain current = 4 A, T
J
=
27
32
25°C
High side power MOSFET drain to
R
DSON_HI
m
Ω
source on resistance
V
BOOT
– V
PHASE
= 5.5 V, Drain current = 4 A, T
J
= 0
27
46
to 125°C
Bootstrap refresh comparator
V
BOOT
– V
PHASE
when low side refresh pulse is
V
BOOT_REFRESH
4
V
threshold voltage
requested
I
BOOT_LEAK
BOOT leakage current
High Side is on; Charge enabled
200
μ
A
PWM LOW SIDE POWER MOSFET
V
VDDP
= 6 V, Drain Current = 4A, T
J
= 25°C
38
45
Low side power MOSFET drain to
R
DS_LO_ON
m
Ω
source on resistance
V
VDDP
= 6 V, Drain Current = 4A, T
J
= 0 to 125°C
38
66
PWM DRIVERS TIMING
Dead time when switching between High-Side
Minimum driver dead time
MOSFET and Low-Side MOSFET. Adaptive
25
ns
protective dead-time could be more.
PWM OSCILLATOR
F
SW
PWM switching frequency
540
700
840
kHz
V
RAMP_OFFSET
PWM ramp offset
200
mV
V
RAMP_HEIGHT
PWM ramp height
As percentage of DCINA
6.67
%DCINA
QUIESCENT CURRENT
Total off-state battery current from
CSOP, CSON, VFB, DCINA,
CSOP, CSON, VFB, DCINA,
V
VFB
= 16.8 V, V
ACIN
< 0.6 V,
I
OFF_STATE
7
10
μ
A
DCINP, BOOT, PHASE, etc.,
V
DCINA
> 5 V,
≤
T
J
= 0°C to 85°C
Adapter removed
V
VFB
= 16.8 V, 0.6V < V
ACIN
< 2.4 V,
I
BAT_ON
Battery on-state quiescent current
1
mA
V
DCINA
> 5 V
Internal battery load current,during
Charge is disabled: V
VFB
= 16.8 V,
I
BAT_LOAD_CD
charge disabled, adapter
V
ACIN
> 2.4 V, V
DCINA
> 5 V
0.5
1
mA
connected
Internal battery load current during
CE = high, V
VFB
= 16.8 V,
I
BAT_LOAD_CE
charge enabled, charging. CSOP,
6
10
12
mA
V
ACIN
> 2.4 V, V
DCINA
> 5 V
CSON, VFB, BOOT, PHASE
Adapter quiescent current, charge
I
AC
CE = low, V
DCINA
= 20 V
0.5
1
mA
disabled
Adapter switching quiescent
Charge enabled, V
DCINA
= 20 V, converter switching
I
AC_SWITCH
25
mA
current
INTERNAL SOFT START (8 Steps to Regulation Current ICHG)
Soft start steps
8
step
Soft start step time
1.6
ms
CHARGER SECTION POWER-UP SEQUENCING
Charge-Enable Delay after
Delay from when adapter is detected and CE is high
2
ms
Power-up
to when the charger is allowed to turn on
8
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