-
The SG3525A series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip + 5.1 V reference is trimmed to ±1 % and the input common-mode range of the error amplifier includes the reference voltage eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time ad- justment.These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuity and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown,as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for sub-normal input voltages. This lockout circuitry includes approximately 500 mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulses has been terminated for any reason,the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200 mA. The SG3525A output stage features NOR logic, giving a LOW output for an OFF state.
主要特性
- DUAL SOURCE/SINK OUTPUT DRIVERS
- LATCHING PWM TO PREVENT MULTIPLE PULSES
- PULSE-BY-PULSE SHUTDOWN
- INTERNAL SOFT-START
- 8 TO 35 V OPERATION
- 100 Hz TO 500 KHz OSCILLATOR RANGE
- 5.1 V REFERENCE TRIMMED TO ± 1 %
- ADJUSTABLE DEADTIME CONTROL
- INPUT UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
- SEPARATE OSCILLATOR SYNC TERMINAL
下载
精选 视频
All resources
产品规格 (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 23 Sep 2020 |
23 Sep 2020
|
Design Notes & Tips (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 25 Jul 2018 |
25 Jul 2018
|
简报 (1)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 21 Jun 2018 |
21 Jun 2018
|
手册 (2)
| Resource title | Latest update | |||
|---|---|---|---|---|
| 23 Mar 2020 |
23 Mar 2020
|
|||
| 29 Jul 2020 |
29 Jul 2020
|
CAD/EDA Symbols, Footprints and Models
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| SG2525AN |
批量生产
|
PDIP 16 | 工业 | Ecopack2 |
|
| SG2525AP |
批量生产
|
SO-16 | 工业 | Ecopack2 | |
| SG2525AP013TR |
批量生产
|
SO-16 | 工业 | Ecopack2 |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| SG2525AN | 8 distributors | 立即购买 |
批量生产
|
EAR99 | NEC | Tube | PDIP 16 | - | - | CHINA | 0.6852 / 1k | |
| SG2525AP | 6 distributors | 立即购买 |
批量生产
|
EAR99 | NEC | Tube | SO-16 | - | - | CHINA | 0.6852 / 1k | |
| SG2525AP013TR | 5 distributors | 立即购买 |
批量生产
|
EAR99 | NEC | Tape And Reel | SO-16 | - | - | CHINA | 0.6852 / 1k | |
