参数资料
型号: SC493ULTRT
厂商: Semtech
文件页数: 23/28页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM MLPQ-20
标准包装: 1
系列: EcoSpeed®, SmartDrive™
PWM 型: 控制器
输出数: 1
频率 - 最大: 1MHz
电源电压: 3 V ~ 5.5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 20-MLPQ
包装: 标准包装
其它名称: SC493ULTRTDKR
SC493
Definition of Registers and Bits (continued)
Name
UPSV1
UPSV0
Bit
03h
[5]
02h
[5]
Definition
Ultrasonic Power Save
Frequency
Description
2 bits that control the nominal minimum switching frequency in ultrasonic mode.
00 : 6.25kHz
01 : 12.5kHz
10 : 18.75kHz
11 : 25kHz
Output Voltage Control — Registers 4 and 6
These registers provide fine & coarse control over the output voltage. Margin bits can vary the the output by +/-10% in
5% steps. VFBadj can move the output by +/-9% in 0.75% steps. When both registers are used together, the change in
the output voltage is determined by the multiplication of the 2 settings, i.e., setting Margin to +10% with +9% VFBadj
will change the output by +19.9% whereas a setting Margin to +10% with -9% VFBadj will change the output by
+0.1%.
Name
Bit
Definition
Description
000xx : -9%
00100 : -8.25%
00101 : -7.50%
00110 : -6.75%
00111 : -6%
01000 : -5.25%
01001 : -4.50%
01010 : -3.75%
01011 : -3%
01100 : -2.25%
VFBadj4
VFBadj3
VFBadj4
VFBadj1
VFBadj0
04h[4:0]
Output Voltage
Adjustment
01101 : -1.50%
01110 : -0.75%
01111 : -0%
10000 : -0%
10001 : +0.75%
10010 : +1.50%
10011 : +2.25%
10100 : +3%
10101 : +3.75%
10110 : +4.50%
10111 : +5.25%
11000 : +6%
11001 : +6.75%
11010 : +7.50%
11011 : +8.25%
111xx : +9%
These bits control whether margining is disabled, set to high or set to low.
000 : Margining disabled
001 : Set output to 10% below set value
Margin1
Margin0
06h[2:0]
Margin Control
010 : Set output to 5% below set value
011 : Margining disabled
100 : Margining disabled
101 : Set output to 5% above set value
110 : Set output to 10% above set value
111 : Margining disabled
23
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