參數(shù)資料
型號(hào)： P95020ZNQGI
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： 電源管理
英文描述： 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, QCC132
封裝： QFN-132
文件頁數(shù)： 121/137頁
文件大小： 3533K
代理商： P95020ZNQGI
P95020 / Preliminary Datasheet
Revision 0.7.10
84
2010 Integrated Device Technology, Inc.
9.1
LED_BOOST - ELECTRICAL CHARACTERISTICS
Unless otherwise specified, typical values at TA =25C, VIN=VSYS = 3.8V, VPGND=VDGND=0V, VLED_BOOST_SINK=0.9V, TA = -40°C to +85°C, COUT=1F,
L=22H
SYMBOL
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNIT
VIN
LED Boost Input Voltage
If tied to other than
VSYS = 3.0V to 4.5V
3.0
5.5
V
LEDREG
LED Boost Regulation Voltage
0.90
V
VOVP
OVP Trip Voltage
Trip level of
LED_BOOST_VSENSE input
1.15
1.25
V
VISENSE
Current Sense Maximum Voltage
VSYS = 3.0V to 4.5V
150
180
210
mV
IBIAS
Input Bias Current For OVP and Isense
-0.1
0.1
A
TGRISE
LED_BOOST_GATE Pin Rise Time
CGATE = 1nF
12
ns
TGFALL
LED_BOOST_GATE Pin Fall Time
CGATE = 1nF
7
ns
ISINK_FULL
LED Current Range
– Full Scale
LED_BOOST_ISET 0x86 [4:0],
LED_BOOST_SCALE 0x86 [6:6] =
0 - Half Scale, 1 - Full Scale
0.78
0.39
25
12.5
mA
I
SINK_FULL
LED Current Step Size (LSB)
– Full Scale
0.78
mA
I
SINK_HALF
LED Current Step Size (LSB)
– Half Scale
0.39
mA
LEDSLEW
LED Current Step Slew Rate
ILED Change From 5mA to 20mA
1/32
LSB/us
InitACC
Initial Current Accuracy
ISINK = 20 mA, VSINK = 0.9V
-5
+5
%
fCLKL
Main Clock (Low)
LED_BOOST_CTRL 0x87 [1:1] = 0
=0.5 MHz, Note 1
0.5
MHz
fCLKH
Main Clock (High)
LED_BOOST_CTRL 0x87 [1:1] = 1
= 1.0 MHz, Note 1
1.0
MHz
DCLOCK
Max Gate Output Duty Cycle
94
%
tON(MIN)
Minimum Output On Time
100
ns
IQPS
VLED_BOOST_VIN Shutdown Current
VLED_BOOST_VIN = 4.5V
1
A
IDD
Operating Current
Note 2
1.6
mA
UVLO
Under Voltage Lock Out Threshold
VSYS Rising. (Shared DC/DC, LDOs
except Pre-DC/DC)
2.85
2.95
V
UVLOHYST
Under Voltage Lock Out Hysteresis
150
mV
Notes:
1.
Guaranteed by design and/or characterization
2.
Value does not include current through external components
9.2
LED_BOOST
– TYPICAL PERFORMANCE CHARACTERISTICS
LED_Boost Efficiency (%) vs. Iout (mA)
with two strings of 10 LEDs
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0
10
20
30
40
50
IOUT (mA)
E
FF
IC
IE
N
C
Y
(%
)
VIN = 4.5V
VIN = 3.8V
Figure 22
– LED Boost Efficiency vs Load Current (two srings of 10 LEDs)
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