參數(shù)資料
型號(hào)： TPS40022PWPR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 0.01 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： POWERPAD, PLASTIC, HTSSOP-16
文件頁(yè)數(shù)： 12/29頁(yè)
文件大?。?/td> 337K
代理商： TPS40022PWPR
TPS40020
TPS40021
TPS40022
SLUS535 – MARCH 2003
www.ti.com
2
DESCRIPTION (CONTINUED)
The overcurrent detection is programmable through a single resistor. Programmable overcurrent limit allows the
detection threshold to be easily tailored to accommodate different size (RDS(on)) MOSFETs. The overcurrent function
provides pulse-by-pulse current limiting during soft-start and short term transient conditions as well as a fault counter
to handle longer duration overcurrent conditions. If a fault is detected the controller shuts down for a period of time
determined by six (6) consecutive soft-start cycles. The controller automatically retries the output every seventh (7th)
soft-start cycle.
In addition to determining the off time during a fault condition, the soft-start ramp provides a closed loop controlled
ramp of the converter output during startup. Programmability allows the ramp rate to be adjusted for a wide variety
of output L-C component values.
The output voltage transient comparators provide a quick response , first strike, approach to output voltage
transients. The output voltage is sensed through a resistor divider at the OSNS pin. If an overvoltage condition is
detected the HDRV gate drive is shut-off and the LDRV gate drive is turned on until the output is returned to regulation.
Similarly, if an output undervoltage condition is sensed the HDRV gate drive goes to 95% duty cycle to pump the
output back up quickly. In either case, the PowerGood open drain output pulls low to indicate an output voltage out
of regulation condition. The PowerGood output can be daisy-chained to the SS/SD pin or enable pin of other
controllers or converters. The transient comparators can be disabled by simply tying the OSNS pin to VDD.
The TPS4002X can be externally synchronized through the ILIM/SYNC pin up to 1.5
× the free-running frequency.
This allows multiple contollers to be synchronized to eliminate EMI concerns due to input beat frequencies between
controllers.
INTERNAL BLOCK DIAGRAM
UDG–02092
2
BOOT2
13
VDD
9
1
PWRGD
5
SW
14
COMP
6
PVDD
12
SS/SD
8
LDRV
11
SGND
UVLO
VDD
3
OSNS
4
FB
7
RT
0.728 V
0.672 V
+
0.7 V
OSC
UVLO
PREDICTIVE
GATE
DRIVE(tm)
PWM
LOGIC
CLK
CHARGE
PUMP
BOOT1
16
HDRV
15
PWM
SS
ACTIVE
DRV
VDD
UVLO
FAULT
COUNTER
SOFT
START
FAULT
SS
ACTIVE
DCHG
CLK
–
+
OC
0.5 V
UVLO
ISS
SD
VDD
UVLO
1 V
VDD
SYNC
DRV
PVDD
PGND
10
CURRENT LIMIT
COMPARATOR
+
1.4 V
+
ILIM/
SYNC
VDD
DISABLE
PRODUCT
PREVIEW
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參數(shù)描述
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TPS40040DRBR 功能描述:DC/DC 開關(guān)控制器 Lo Vin Synch Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40040DRBRG4 功能描述:DC/DC 開關(guān)控制器 Lo Vin Synch Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40040DRBT 功能描述:DC/DC 開關(guān)控制器 Low Vin Synch Buck DC/DC Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TPS40040DRBT 制造商:Texas Instruments 功能描述:Peak Reflow Compatible (260 C):Yes
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