参数资料
型号: ISL8120EVAL3Z
厂商: Intersil
文件页数: 34/35页
文件大小: 0K
描述: EVALUATION BOARD FOR ISL8120
标准包装: 1
主要目的: DC/DC,步降
输出及类型: 2,非隔离
输出电压: 1.2V,1.2V
电流 - 输出: 2 x 25A 或 1 x 50A
输入电压: 3 ~ 22 V
稳压器拓扑结构: 降压
频率 - 开关: 150kHz ~ 1.5MHz
板类型: 完全填充
已供物品:
已用 IC / 零件: ISL8120
ISL8120
dividers. Note that the farther the output voltage setpoint
away from the internal reference voltage, the larger the
2.5
%min = ( Vref ? ( 1 – Ref% ) – V OS_DA ) ? ? 1 + ---------------------------------------- ?
R OSMAX = -----------------------------------------------------------------------------------------------------
----------------------------------------- + ----------------------------------------------------
%max = ( Vref ? ( 1 – Ref% ) – V OS_DA ) ? ? 1 + ---------------------------------------- ?
tolerance; the lower the resistor tolerance (R%), the tighter
the regulation .
? R FB ? ( 1 – R% ) ?
? R OSMAX ?
(EQ. 9)
1
1 1
R OS ? ( 1 + R% ) R DIF ? ( 1 + R DIF % )
? R FB ? ( 1 – R% ) ?
? R OSMIN ?
2.0
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
R% = 1%
0.5%
0.1%
0.1%
0.5%
1%
(EQ. 10)
-2.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
R OSMIN = -----------------------------------------------------------------------------------------------
--------------------------------------- + -------------------------------------------------
R OS ? ( 1 – R % ) R DIF ? ( 1 – R DIF % )
1
1 1
OUTPUT VOLTAGE (V)
FIGURE 26. OUTPUT REGULATION WITH DIFFERENT
RESISTOR TOLERANCE FOR Ref% = ± 0.6%
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Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
34
April 7, 2009
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