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參數(shù)資料
| 型號(hào)： | RT9228 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | ADVANCED PWM AND DUAL LINEAR POWER CONTROLLER |
| 中文描述： | 先進(jìn)的PWM和雙重線性電源控制器 |
| 文件頁(yè)數(shù)： | 4/10頁(yè) |
| 文件大?。?/td> | 164K |
| 代理商： | RT9228 |
RT9228
www.richtek.com
4
DS9228-03 July 2001
Function Block Diagram
Functional Pin Description
VCC (Pin 1)
Provide a 12V bias supply for the IC to this pin. This
pin also provides the gate bias charge for all the
MOSFETs controlled by the IC.
VID0, VID1, VID2, VID3, VID4 (Pin 6, 5, 4, 3, and 2)
VID0~4 are the input pins to the 5-bit DAC. The
states of these five pins program the internal voltage
reference, DACOUT. The level of DACOUT sets the
core converter output voltage. It also sets the core
PGOOD and OVP thresholds. Table 1 specifies the
DACOUT voltage of 32 combinations of VID levels.
PGOOD (Pin 7)
PGOOD is an open collector output used to indicate
the status of the output voltage. This pin is pulled low
when the core output is not within
±
10% of the
DACOUT reference voltage and the other outputs are
below their under-voltage thresholds.
The PGOOD output is open for ‘11111’ VID codes
that inhibit operation. See table 1.
FAULT (Pin 8)
This pin is low during normal operation, but it is
pulled to about 8V (V
CC
= 12V) in the event of an
over-voltage or over-current condition.
SS (Pin 9)
Connect a capacitor from this pin to ground. This
capacitor, along with an internal 11
μ
A (V
SS
>1V)
current source, sets the soft-start interval of the
converter.
110%
90%
115%
POWER-ON
RESET (POR)
SOFT-START
& FAULT
LOGIC
TTL D/A
CONVERTER
(DAC)
OSCILLATOR
GATE
CONTROL
LOGIC
LINEAR
UNDER
VOLTAGE
+
PGOOD
PHASE1
LGATE1
PGND
GND
VCC
FB3
FAULT
VID0
VID1
VID2
VID3
SS
3.3V
OCSET1
VSEN1
COMPENSATION
GATE3
0.3V
3.3V
VIN2
1.26V
VOUT2
FB2
0.25A
0V
VCC
11
μ
A
5V
VID4
DACOUT
ERROR
AMP
LUV
OC1
FB1
PWM
INHIBIT
PWM COMP
LOWER
DRIVE
VCC
VCC
UPPER
DRIVE
UGATE1
200
μ
A
OC2
+
_
+
_
+
_
+
_
+
_
_
+
_
+
_
+
_
_
_
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| RT9228_07 | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Advanced PWM and Dual Fixed Linear Power Controller |
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| RT9228GS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Advanced PWM and Dual Fixed Linear Power Controller |
| RT9228PS | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Advanced PWM and Dual Fixed Linear Power Controller |
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