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| 型号： | TPS65530ARSLT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.6 A BATTERY CHARGE CONTROLLER, 1650 kHz SWITCHING FREQ-MAX, PQCC48 |
| 封装： | 6 X 6 MM, 0.40 MM PITCH, GREEN, PLASTIC, VQFN-48 |
| 文件页数： | 5/32页 |
| 文件大小： | 923K |
| 代理商： | TPS65530ARSLT |
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Soft Start
Undervoltage Lockout (UVLO)
Protection
www.ti.com............................................................................................................................................................ SLVS835C – APRIL 2008 – REVISED APRIL 2009
Figure 2. CH5/6 Power ON/OFF Sequence
This function reduces the rush current from the battery at start-up. This device has two slopes defined by S/S
(pin 9) and S/S56 (pin 45). The slopes of CH1–4 are defined by S/S; the slopes of CH5/6 depend on SEQ56 (pin
47) signal level. When SEQ56 is low, the slope of CH5 is defined by S/S; the slope of CH6 is defined by S/S56.
When SEQ56 is high, the slopes of CH5/6 are defined by S/S56. The soft-start time is calculated by Equation 1
and Equation 2.
TS/S = CS/S × 60
(1)
TS/S56 = CS/S56 × 6.25
(2)
Where:
CS/S = Capacitance at S/S [F]
TS/S = Soft-start duration defined by S/S [ms]
CS/S56 = Capacitance at S/S56 [F]
TS/S56 = Soft-start duration defined by S/S56 [ms]
The recommended capacitances are CS/S = 0.1 [F] or TS/S = 6.0 [ms], CS/S56 = 1.0 [F] or TS/S56 = 6.25 [ms].
This device monitors the battery voltage level at VCC2 (pin 12) When XSLEEP is high and VCC2 is less than the
threshold (defined in Electrical Characteristics as UVLO detect level), the operation shuts down immediately
without the power OFF sequence. UVLO has a hysteresis as shown in Figure 3. This factor is defined in
Electrical Characteristics as UVLO hysteresis.
Figure 3. UVLO Hysteresis
The TPS65530A has three protection conditions: overcurrent protection (OCP), overvoltage protection (OVP),
and thermal shutdown (TSD) (see Table 2).
Copyright 2008–2009, Texas Instruments Incorporated
13
Product Folder Link(s): TPS65530A
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