參數(shù)資料
型號(hào)： TPS65800RTQTG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源管理
英文描述： 8-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC56
封裝： 8 X 8 MM, GREEN, PLASTIC, QFN-56
文件頁(yè)數(shù)： 8/98頁(yè)
文件大?。?/td> 2077K
代理商： TPS65800RTQTG4
www.ti.com
V(OUT) * 1.2
500 kW
ELECTRICAL CHARACTERISTICS – LED AND PWM DRIVERS
Current range, Vin = 3.3 V,
I
O(SM3) +
V(SM3REF)
R
FB3
SLVS606C – SEPTEMBER 2005 – REVISED FEBRUARY 2007
ELECTRICAL CHARACTERISTICS – ADC (continued)
Over recommended operating conditions (typical values at T
J = 25°C), V(ADC_REF) =2.535v if external reference voltage is
used,application circuit as in Figure 3 (unless otherwise noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
00
A
ADC channel 1 bias current, set via
01
10
I2C register ADC_WAIT bits
ANLG1 pin internal pullup
I(ANLG1)
(BATIDI_D1, BATIDI _D2)
current source
10
50
11
60
Total accuracy
10%
INTERNAL REFERENCE POWER CONSUMPTION
PDACTIVE
Power dissipation
Conversion active
2.3
mW
PDARMED
Power dissipation
Not converting
0.43
mW
TRIGGER TIMING CHARACTERISTICS
tDELAY(TRG)
Trigger delay time accuracy
Time range, set via I2C register ADC_DELAY
0
750
S
Relative to typical value set via I2C
–20%
20%
tWAIT(TRG)
Trigger wait time accuracy
Time range, set via I2C register ADC_WAIT
0
20.48
mS
Relative to typical value set via I2C
–20%
20%
Over recommended operating conditions (typical values at T
J = 25°C), application circuit as in Figure 3 (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SM3 BOOST CONVERTER, WHITE LED CONSTANT-CURRENT DRIVER
VVIN(SM3)
Input Voltage range
V(OUT) = 3.3 V
3
4.7
V
VOVP3
Output overvoltage trip
OVP detected at V(SM3) > VOVP3
26.5
29
30
V
VHYS(OVP3)
Output overvoltage hysteresis
OVP not detected at V(SM3) < VOVP3 – VHYS(OVP3)
1.8
V
LED current below regulation point at
VSM3REF
LED current sense threshold
244
252
260
mV
V(FB3) < VSM3REF
0.5
25
mA
IO(SM3)
LED current
Total accuracy, IO(SM3) = 10mA
–10%
10%
DSM3SW = 0% to 99.6%, set
DSM3SW
LED switch duty cycle
Duty cycle range
via I2C, 256 steps 0.4%
--
minimum step
SM3_LF_OSC = 0
122
LED switch duty cycle pattern
256 pulses within repetition
fREP_SM3
Hz
repetition rate
rate time
SM3_LF_OSC = 1
183
LED switch MOSFET
RDSON(SM3SW)
V(OUT) = 3.6 V; I(SM3SW) = 20 mA
1
2
on-resistance
ILKG(SM3SW)
LED switch MOSFET leakage
1
A
Power stage MOSFET
RDSON(L3)
V(OUT) = 3.6 V; I(L3) = 200 mA
300
600
m
on-resistance
ILKG(L3)
Power stage MOSFET leakage
1
A
Power stage MOSFET current
IMAX(L3)
3 V < V(OUT) < 4.7 V
400
500
600
mA
limit
PWM DRIVER, PWM OPEN DRAIN OUTPUT
VOL(PWM)
Low level output voltage
I(PWM) = 150 mA
0.5
V
Set via I2C, fPWM =
Frequency range
Hz
0.5/1/1.5/2/3/4.5/7.8/15.6
fPWM
PWM driver frequency
Total accuracy, relative to selected value
– 20%
20%
tRISE_PWM
Rise time PWM voltage
IOL_PWM = 150 mA
0.2
1
2.8
s
16
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