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参数资料
| 型号： | DS2715Z+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/17页 |
| 文件大小： | 0K |
| 描述： | IC NIMH CHARGER 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 镍金属氢化物 |
| 电源电压： | 4.5 V ~ 16 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
DS2715: NiMH Battery Pack Charge Controller
PRESENCE
The DS2715 enters the PRESENCE state whenever V DD > V UVLO and V BATT > V OPEN indicating that the charge
source is present, but no cell is available to charge. The DS2715 will remain in the PRESENCE state until a cell is
inserted into the circuit causing the voltage on V BATT to fall below 1.55V (V DET ) and the cell temperature is inside a
valid charging range between 0°C and 45°C (T THM-MIN and T THM-MAX when used with recommended thermistor and
resistor values). If both of these conditions are met, the DS2715 will enter PRE-CHARGE. If cells are inserted, but
the temperature is outside the valid charging range, the DS2715 will remain in the PRESENCE state until the cell
temperature falls within the valid charging range.
PRE-CHARGE
The DS2715 enters the PRECHARGE state when a valid cell voltage is applied to V BATT and the cell temperature
as measured by the DS2715 thermistor circuit is within the valid charging range. PRE-CHARGE mode has a 4
second filter to suppress noise on V BATT caused by cell insertion that may cause a premature return to PRESENCE
state. The DS2715 precharges the cell by regulating the voltage drop across the sense resistor to -33mV (V TO ) in
linear mode or -29mV (V TO + 0.5 x V HYS-TO ) in comparator mode. The polarity of the voltage drop across the sense
resistor is referenced to the polarity relationship indicated by the SNS+ and SNS- pins on the device. Precharging
will last until the cell voltage measured by V BATT exceeds 1.0V (V BATT > V LB ), at which time the DS2715 will enter
the FAST-CHARGE state. If the cell voltage does not exceed V LB within 30 minutes or if the cell temperature
exceeds 50°C at any time during PRECHARGE, the DS2715 enters the FAULT state. If at any time during
PRECHARGE the voltage on V BATT exceeds 1.65V (V OPEN ), the DS2715 determines that the cell pack has been
removed and returns to the PRESENCE state.
FAST-CHARGE
In FAST-CHARGE mode, the DS2715 regulates the voltage across the sense resistor to -121mV (V FC ) in linear
mode or about -107mV (V FC + 0.5 x V HYS-FC ) in comparator mode. LED1 indicates the cell pack is being charged.
During FAST-CHARGE, the DS2715 constantly measures the rate of change of the cell temperature (dT/dt). When
the cell pack’s dT/dt exceeds 0.5°C per minute (T TERM ) the DS2715 enters the TOPOFF state. The DS2715 ignores
changes in the cell temperature caused by charge initiation for the first 4.3 minutes (t BLANK ). As secondary
overcharge protection, the DS2715 will terminate FAST-CHARGE and enter TOPOFF based on a time delay set
by the external resistor on the R T pin. This resistor value can set the secondary charge termination delay to
anywhere from 30 minutes up to 6 hours. If the cell temperature exceeds 50°C at any time during FAST-CHARGE,
the DS2715 enters the DONE state. If at any time during FAST-CHARGE the voltage on V BATT exceeds 1.65V
(V OPEN ), the DS2715 determines that the cell pack has been removed and returns to the PRESENCE state.
TOPOFF
In TOPOFF mode, the DS2715 regulates the voltage across the sense resistor to -33mV (V TO ) in linear mode or -
29mV (V TO + 0.5 x V HYS-TO ) in comparator mode. LED1 indicates the cell pack is being charged. The charge timer is
reset and restarted with a time-out period of one-half (one-quarter for DS2715B) the fast-charge duration. When
the charge timer expires or if the measured temperature exceeds 50°C, the charger enters the DONE state.
DONE/Maintenance
The DS2715 enters the DONE state whenever the charge completes normally or if the measured cell temperature
exceeds 50°C during the charge. While in the done state V CH is driven to high impedance to prevent further
regulated charging of the cell pack and LED is driven high-impedance to indicate no charging is taking place. A
maintenance charge can be applied to the cells by providing a one-way resistive path from the charge source to the
cell pack bypassing the regulating transistor. See the example in the circuit of Figure 3. The DS2715 remains in the
DONE state until a cell voltage greater than 1.65V (V OPEN ) is detected on V BATT indicating cell pack removal, the Rt
pin is floated (see SUSPEND function), or DISCHARGE mode is entered.
FAULT
The DS2715 enters FAULT if PRECHARGE is unable to charge the cell above 1.0V (V LB ) before the 30 minute
PRECHARGE timeout (t PC-TO ) or if the cell temperature exceeds 50°C during PRECHARGE. In the fault state, V CH
is high impedance and LED1 output pulses to indicate the fault condition. The DS2715 remains in FAULT until a
cell voltage greater than 1.65V (V OPEN ) is detected on V BATT indicating the cell pack has been removed. The
DS2715 then enters the PRESENCE state and waits for the next cell insertion.
SUSPEND
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| DS271AC-C20/0.03 | 制造商:ABB Control 功能描述:RCBO 20A 30MA TRIP 制造商:ABB Control 功能描述:RCBO, 20A, 30MA TRIP 制造商:ABB Control 功能描述:RCBO, 20A, 30MA TRIP; Voltage Rating V AC:230V; Current Rating:20A; No. of Poles:1; Series:DS271; Approval Category:BS EN 61009-2-2, EN 61009-1, IEC 61009; Breaking Capacity Current AC:10kA; External Depth:67.6mm; External Length / ;RoHS Compliant: Yes 制造商:ABB Control 功能描述:Type C DIN rail mount RCBO,10KA 20A |
| DS271AC-C25/0.03 | 制造商:ABB Control 功能描述:RCBO 25A 30MA TRIP 制造商:ABB Control 功能描述:Type C DIN rail mount RCBO,10KA 25A |
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