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参数资料
| 型号： | MAX15049EVKIT+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 22/31页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX15049 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 3，非隔离 |
| 输出电压： | 1.2V，1.8V，3.3V |
| 电流 - 输出： | 6A，3A，3A |
| 输入电压： | 5 V ~ 16 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 500kHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MAX15049 |
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MAX15048/MAX15049
Triple-Output Buck Controllers
with Tracking/Sequencing
Below are equations that define the power modulator:
especially the output capacitor. For cost-sensitive appli-
G MOD(DC) =
V IN
V RAMP
cations, use aluminum electrolytic capacitors; for space-
sensitive applications, use low ESR tantalum or multilayer
ceramic chip (MLCC) capacitors at the output. The higher
switching frequencies of the MAX15048/MAX15049 allow
f LC =
1
2 π × L × C OUT
the use of MLCC as the primary filter capacitor(s).
First, select the passive and active power compo-
nents that meet the application’s output ripple, compo-
nent size, and component cost requirements. Second,
f ZERO, ESR =
1
2 π × ESR × C OUT
choose the small-signal compensation components to
achieve the desired closed-loop frequency response
and phase margin as outlined below.
f ZERO, ESL =
ESR
2 π × ESL
Closed-Loop Response and Compensation
of Voltage-Mode Regulators
The power modulator’s LC lowpass filter exhibits a vari-
ety of responses, depending on the value of L and C
The switching frequency is programmable between
200kHz and 1.2MHz using an external resistor at RT.
Typically, the crossover frequency (f CO ), which is the
frequency when the system’s closed-loop gain is equal
to unity, crosses the 0dB axis, and should be set at or
below 1/10 the switching frequency (f SW /10) for stable,
closed-loop response.
The MAX15048/MAX15049 provide an internal transcon-
ductance amplifier with its inverting input and its output
available to the user for external frequency compensation.
The flexibility of external compensation for each con-
verter offers wide selection of output-filtering components,
40
f LC
20
(and their parasitics).
One such response is shown in Figure 4a. In this exam-
ple, the power modulator’s uncompensated crossover
is approximately 1/6 the desired crossover frequency,
f CO . Note also, the uncompensated rolloff through 0dB
plane follows the double-pole, -40dB/decade slope and
approaches 180° of phase shift, indicative of a poten-
tially unstable system. Together with the inherent 180° of
phase delay in the negative feedback system, this can
lead to near 360°, or “positive” feedback—an unstable
system.
90
45
0
-20
-40
|G MOD | ASYMPTOTE
< G MOD
f ZERO, ESR
|G MOD |
0
-45
-90
f ZERO, ESL
-60
-80
FREQUENCY (Hz)
Figure 4a. Power Modulator Gain and Phase Response (Large, Bulk C OUT )
22
-135
-180
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX15049EVKIT+ | 功能描述:电源管理IC开发工具 MAX15049 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX1504YETL+ | 制造商:Maxim Integrated Products 功能描述:HIGHLY INTEGRATED LINEAR BATTERY CHARGER - Rail/Tube |
| MAX1504YETL+T | 制造商:Maxim Integrated Products 功能描述:HIGHLY INTEGRATED LINEAR BATTERY CHARGER - Tape and Reel |
| MAX1504ZETL+ | 制造商:Maxim from Components Direct 功能描述:THE MAXIM MAX1504ZETL+ IS A BATTERY CHARGER. - Rail/Tube 制造商:Maxim 功能描述:The Maxim MAX1504ZETL+ is a Battery Charger. |
| MAX1504ZETL+D | 制造商:Maxim Integrated Products 功能描述:HIGHLY INTEGRATED LINEAR BATTERY CHARGER - Rail/Tube |
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