參數(shù)資料
型號: AIC1569ACS
廠商: Analog Integrations Corporation
英文描述: RESISTOR, CHIP, 6.19K-1%-0.0625W
中文描述: 5位DAC,同步PWM功率調(diào)節(jié)器
文件頁數(shù): 5/7頁
文件大小: 240K
代理商: AIC1569ACS
AIC1569A
5
BLOCK DIAGRAM
VCC
GND
LGATE
PGND
RT
BOOT
UGATE
PHASE
OCSET
OVP
PGOOD
VCC
CONTROL
LOGIC
I
OCS
200
μ
A
OVER
CURRENT
VID0
VID1
VID2
VID3
VID4
VSEN
SOFT
START
10
μ
A
4V
FB
OVP
POWER-ON
RESET
50%
POWER GOOD
+
SS
90%
110%
115%
ERROR AMP
OSCILLATOR
COMPARATOR
PWM
REFERENCE
COMP
5-BITS DAC
+
+
+
+
+
+
VDAC
PIN DESCRIPTIONS
PIN 1: VSEN - Converter output voltage sense
pin. Connect this pin to the
converter output. The PGOOD
and OVP comparator circuits use
this signal to report output voltage
status and perform overvoltage
protection function.
PIN 2:OCSET- Current limit sense pin. Connect a
resistor R
OCSET
from this pin to the
drain of the external MOSFET.
R
OCSET
, an internal 200
μ
A current
source (I
OCS
), and the external
MOSFET on-resistance (R
DS(ON)
)
jointly set the over current trip
point according to the following
equation:
I
I
R
R
PEAK
OCS
OCSET
DS ON
(
=
×
)
If FB pin voltage is sensed to be
below 50% of the internal voltage
reference VDAC, the over current
comparator cycles the soft-start
function.
PIN 3:SS
- Soft start pin. Connect a capacitor
from this pin to ground. An internal
10
μ
A current source provides soft
start function for the converter.
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