參數(shù)資料
型號(hào): TPS5211PWP
廠商: Texas Instruments, Inc.
英文描述: HIGH FREQUENCY PROGRAMMABLE HYSTERETIC REGULATOR CONTROLLER
中文描述: 可編程滯高頻穩(wěn)壓控制器
文件頁數(shù): 25/32頁
文件大?。?/td> 469K
代理商: TPS5211PWP
TPS5211
HIGH FREQUENCY PROGRAMMABLE HYSTERETIC
REGULATOR CONTROLLER
SLVS243 – SEPTEMBER 1999
25
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
using the TPS5211 when only 5 V is available
The TPS5211 controller requires 12 V for internal control of the device. If an external source for 12 V is not
available, a small onboard source must be included in the design. A simple boost circuitry is described in TIs
application report AN452 Providing a DSP Power Solution from +5 V or +3.3 V only Systems.Total 12-V current
depends on switching frequency and power FETs gate charge characteristics. For reliable operation, this
current should not exceed 120 mA. The power stage is not voltage dependent, but component values must be
selected for 5-V inputs. The frequency of operation is dependent upon the power stage input voltage. A typical
5-V only application circuit is shown in Figure 22.
ENABLE
R4
11.0 k
C8
2200 pF
1%
12V
10.0 k
R1
1%
1 uF
C1
1 uF
C3
C6
0.033 uF
10
9
8
LODRV
BIAS
SLOWST
11
LOHIB
12
DRVGND
13
LOWDR
14
DRV
16BOOT
17HIGHDR
18BOOTLO
19HISENSE
20LOSENSE
21IOUTLO
15VCC
23VID4
24VID3
25VID2
26VID1
27VID0
28PWRGD
22INHIBIT
1
IOUT
3
2
OCP
4
VHYST
6
5
VSENSE
VREFB
7
ANAGND
DROOP
U1
TPS5211
R102
B
L
Q102
L101
GND
C101
H
Q101
R101
D
Power Stage
Control Section
H
5V
L102
RTN
R
C102
+
C103
C104
R103
V
L
L
V
R9 4.32 k
R10
1.00 k
1 uF
C2
R2
150
C4
1 uF
C5
0.1 uF
10.0 k
R3
100
R5
20.0 k
R6
R7 3.92 k
1.00 k
R8
C7
1000pF
R11
7.5k
VO
NOTE A: VID0 – VID4 User – selected to set output voltage.
(see Note A)
Figure 22. Typical 5-V-Only Application Circuit
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