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| 型号： | MAX16046ETN+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 60/70页 |
| 文件大小： | 0K |
| 描述： | IC EE-PROG SYS MGR 12CH 56-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 37 |
| 类型： | 系统管理器 |
| 监视电压数目： | 12 |
| 输出： | 开路漏极，推挽式 |
| 复位： | 低有效 |
| 复位超时： | 可调节/可选择 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 56-WFQFN 裸露焊盘 |
| 供应商设备封装： | 56-TQFN-EP（8x8） |
| 包装： | 管件 |
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MAX16046/MAX16048
12-Channel/8-Channel EEPROM-Programmable
System Managers with Nonvolatile Fault Registers
Set the DACOUT_ range bits (see the DAC Outputs
section) such that V REF falls approximately halfway
within the DACOUT range. Set R 5 to vary the amount of
control the DAC has on the output voltage of the power
DC-DC OR LDO
OUT
supply. Large values of R 5 correspond to higher
degree of resolution control over the output voltage,
and small values of R 5 correspond to lesser degree of
R 1
R 5
MAX16046
MAX16048
resolution control. Be sure to respect the minimum and
maximum output voltages that the DC-DC converter is
capable of generating.
The following is an example that illustrates the use of
the formulas for calculating the margin up and margin
down values. This example uses a generic 3.3V DC-DC
R 3
V REF
R 4
R 2
TRIM
V DACOUT_
converter with a trim input. Below are the margin up
and margin down formulas taken from the data sheet
for the power supply:
Figure 17. Connections for Margining Using Trim Input Method
TRIM DOWN:R ADJ_DOWN = ?
? 2 ? ( k Ω )
? 100
? Δ %
?
?
Table 36. EEPROM Fault Log Operation
? ( k Ω )
TRIM U P :R ADJ_UP = ?
? V OUT_NOM (100 + Δ %) 100 + 2 Δ % ?
Δ %
1.225 Δ %
?
? ?
By inspecting these formulas, V REF = 1.225V, R 3 =
1k Ω , and R 4 = 1k Ω . Set the DACOUT_ range from 0.8V
to 1.6V to fit the reference voltage. The output voltage
of the DC-DC converter is 3.3V; therefore the ratio (1 +
R 1 /R 2 ) = V OUT /V REF = 3.3/1.225 = 2.69.
Set R 5 to zero to use the widest trim range possible
(increase R 5 to decrease the trim range). Insert these
Period
FAULT CONTROL
REGISTER VALUE
r47h[1:0]
00
01
10
DESCRIPTION
Failed lines and
ADC values saved
Failed lines saved
ADC values saved
REQUIRED
PERIOD
t FAULT_SAVE
(ms)
204
60
168
? 1k Ω × V DACOUT + 1k Ω × 1.225 ? ( V DACOUT_ + 1.225
V OUT = ( 2.69 ) ? = ( 2 . 69 )
values into the equations for the output voltage:
? 2k Ω ?? 2
)
No information
11 —
saved
Maintain power for shutdown during fault conditions in
applications where the always-on power supply cannot
For V DACOUT_ = 0.8V, V OUT = 2.72V, and for
V DACOUT_ = 1.6V, V OUT = 3.80V. These output volt-
ages correspond with a margin down limit of -17.6%
and a margin up limit of 15.2%. Since the reference
voltage is not exactly in the center of the DACOUT_
be relied upon by placing a diode and a large capaci-
tor between the voltage source, V IN , and V CC (Figure
18). The capacitor value depends on V IN and the time
delay required, t FAULT_SAVE . Use the following formula
to calculate the capacitor size:
range, the margin limits are not symmetrical. To
decrease the margin limits, increase the value of R 5 .
Maintaining Power During a Fault
C =
t FAULT_SAVE × I CC(MAX)
V IN ? V DIODE ? V UVLO
Condition
Power to the MAX16046/MAX16048 must be main-
tained for a specific period of time to ensure a success-
ful EEPROM fault log operation during a fault that
removes power to the circuit. The amount of time
required depends on the settings in the fault control
register (r47h[1:0]) according to Table 36.
60
where the capacitance is in Farads and t FAULT_SAVE is
in seconds. I CC(MAX) is 6.5mA, V DIODE is the voltage
drop across the diode, and V UVLO is 2.85V. For exam-
ple, with a V IN of 14V, a diode drop of 0.7V, and a
t FAULT_SAVE of 0.204s, the minimum required capaci-
tance is 127μF.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX16046ETN+ | 功能描述:监控电路 12Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16046ETN+CK4 | 功能描述:监控电路 12Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16046ETN+CK9 | 功能描述:监控电路 12Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16046ETN+T | 功能描述:监控电路 12Ch EEPROM Prob System Manager RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| MAX16046EVKIT+ | 功能描述:电源管理IC开发工具 MAX16046 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 |
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