參數(shù)資料
型號： TL2845BQDRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO14
封裝： PLASTIC, MS-012AB, SOIC-14
文件頁數(shù)： 13/16頁
文件大?。?/td> 300K
代理商： TL2845BQDRQ1
SLVSAE2 – JULY 2010
www.ti.com
Output Section Electrical Characteristics
VCC = 15 V
(1), R
T = 10 k, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
TL284xB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP(2)
MAX
IOH = –20 mA
13
13.5
High-level output voltage
V
IOH = –200 mA
12
13.5
IOL = 20 mA
0.1
0.4
Low-level output voltage
V
IOL = 200 mA
1.5
2.2
Rise time(3)
CL = 1 nF, TJ = 25°C
50
150
ns
Fall time(3)
CL = 1 nF, TJ = 25°C
50
150
ns
UVLO saturation(3)
VCC = 5 V, IOL = 1 mA
0.7
1.2
V
(1)
Adjust VCC above the start threshold before setting it to 15 V.
(2)
All typical values are at TJ = 25°C.
(3)
Specified by design. Not production tested.
UNDERVOLTAGE-LOCKOUT SECTION ELECTRICAL CHARACTERISTICS
VCC = 15 V
(1), R
T = 10 k, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
TL284xB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP(2)
MAX
Start threshold voltage
7.8
8.4
9
V
Minimum operating voltage after start-up
7
7.6
8.2
V
(1)
Adjust VCC above the start threshold before setting it to 15 V.
(2)
All typical values are at TJ = 25°C.
PULSE-WIDTH MODULATOR SECTION ELECTRICAL CHARACTERISTICS
VCC = 15 V
(1), R
T = 10 k, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
TL284xB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP(2)
MAX
Maximum duty cycle(3)
94
96
100
%
Minimum duty cycle
0
%
(1)
Adjust VCC above the start threshold before setting it to 15 V.
(2)
All typical values are at TJ = 25°C.
(3)
Specified by design. Not production tested.
SUPPLY VOLTAGE ELECTRICAL CHARACTERISTICS
VCC = 15 V
(1), R
T = 10 k, CT = 3.3 nF, over recommended operating free-air temperature range (unless otherwise specified)
TL284xB
PARAMETER
TEST CONDITIONS
UNIT
MIN
TYP(2)
MAX
Start-up current
0.3
0.5
mA
Operating supply current
VFB and ISENSE at 0 V
11
17
mA
Limiting voltage
ICC = 25 mA
30
34
V
(1)
Adjust VCC above the start threshold before setting it to 15 V.
(2)
All typical values are at TJ = 25°C.
6
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TL2843B-Q1
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TL2845DG4 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14
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