UCD7232RTJT
UCD7232RTJT
- 描述
- 具有电流感应和故障保护功能的数字控制兼容同步降压闸极驱动器 20-QFN -40 to 125
- 品牌名称
- TI(德州仪器)
- 商品型号
- UCD7232RTJT
- 商品编号
- C2878941
- 商品封装
- QFN-20-EP(4x4)
- 包装方式
- 编带
- 商品毛重
- 0.1452克(g)
商品参数
| 属性 | 参数值 | |
|---|---|---|
| 商品目录 | 栅极驱动芯片 | |
| 驱动配置 | 半桥 | |
| 负载类型 | MOSFET | |
| 驱动通道数 | 2 | |
| 灌电流(IOL) | 4A |
| 属性 | 参数值 | |
|---|---|---|
| 拉电流(IOH) | 4A | |
| 工作电压 | 4.7V~15V | |
| 上升时间(tr) | 27ns | |
| 下降时间(tf) | 21ns | |
| 工作温度 | -40℃~+125℃@(Tj) |
商品概述
双通道高电流驱动器。 完全兼容于TI Fusion 数字电源控制器（如UCD91xx 及UCD92xx 系列） 工作开关频率2 MHz 具有独立可调门限的高侧FET 和输出电流限制保护 具有故障标记输出的快速高侧过流感测电路– 可逐个周期地防止出现破坏性的电流水平 差分高增益电流感测放大器 电压与负载电流监视器输出成正比 宽输入电压范围：4.7 V 至15 V 利用一个外部4.5 μ至6.5 V 偏置电源支持2.2 V的工作输入电压 用于栅极驱动及内部电路的板载稳压电压 集成型热关断功能电路 可选的操作模式： 具有自动死区时间控制功能的PWM 及同步整流器使能(SRE) 用于DirectFET 控制的直接高侧栅极及低侧栅极输入 用于功率级关断的三态PWM 输入 UVLO 内务处理电路 额定规格针对 -40℃ 至 ±125℃ 的结温范围而拟订
The UCD7232 is designed primarily to be a synchronous buck driver with current measurement and fault detection capabilities that make it an ideal partner with digital power controllers. This device incorporates two high-current gate drive stages and sophisticated current measurement circuitry that allows for the monitoring and reporting of output load current. Two separate fault detection blocks protect the power stage from excessive load current or short circuits. On-chip thermal shutdown protects the device in case of severe over-temperature conditions. Detected faults immediately truncate the power conversion cycle in progress, without controller intervention, and assert a digital fault flag (FLT). Gate drive voltage is supplied by an on-chip linear regulator. If desired, this regulator can be disabled and an external gate drive voltage can be supplied. Mode selection pins allow the device to be used in synchronous mode or independent mode. In synchronous mode, the high-side and low-side gate timing is controlled by a single PWM input. Anti-cross-conduction dead-time intervals are applied automatically to the gate drives. In independent mode, the high-side and low-side gate drive signals are controlled directly by the PWM and SRE pins. The automatic dead-time logic is disabled in this mode. When operating in synchronous mode, the use of the low-side FET can be disabled under the control of the SRE pin. This feature facilitates start-up into a pre-bias voltage and is also used in some applications to reduce power consumption at light loads.
商品特性
- 双通道高电流驱动器
- 完全兼容于TI Fusion 数字电源控制器（如UCD91xx 及UCD92xx 系列）
- 工作开关频率2 MHz
- 具有独立可调门限的高侧FET 和输出电流限制保护
- 具有故障标记输出的快速高侧过流感测电路
- 差分高增益电流感测放大器
- 电压与负载电流监视器输出成正比
- 宽输入电压范围：4.7 V 至15 V
- 利用一个外部4.5 μ至6.5 V 偏置电源支持2.2 V的工作输入电压
- 用于栅极驱动及内部电路的板载稳压电压
- 集成型热关断功能电路
- 可选的操作模式：具有自动死区时间控制功能的PWM 及同步整流器使能(SRE)
- 用于DirectFET 控制的直接高侧栅极及低侧栅极输入
- 用于功率级关断的三态PWM 输入
- UVLO 内务处理电路
- 额定规格针对 -40℃ 至 ±125℃ 的结温范围而拟订
应用领域
- 针对单相和多相应用的数字控制同步降压功率级
- 数字控制式电源模块
- 数字控制、负载点、同步降压型开关电源