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參數(shù)資料
| 型號： | UCC2919DTR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | GREEN, PLASTIC, MS-012AC, SOIC-16 |
| 文件頁數(shù)： | 23/27頁 |
| 文件大?。?/td> | 701K |
| 代理商： | UCC2919DTR |
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UCC2919
UCC3919
SLUS374C JULY 1999 REVISED NOVEMBER 2005
5
www.ti.com
electrical characteristics, VDD = 5 V, TA = 0°C to 70°C for the UCC3919, –40°C to 85°C for the
UCC2919, all voltages are with respect to GND, TA = TJ, (unless otherwise specified)
SD and L/R inputs
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Input voltage low
0.8
V
Input voltage high
2
V
L/R input current
1
3
6
A
SD internal pulldown impedance
100
270
500
k
FLT output
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Output leakage current
VDD = 5 V
10
A
Output low voltage
IOUT = 10 mA
1
V
FET gate driver and charge pump
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Peak output current
VCAP = 15 V,
VGATE = 10 V
–3
–1
–0.25
mA
Peak sink current
VGATE = 5 V
20
mA
Fault delay
100
300
ns
Maximum output voltage
VDD = 3 V,
average IOUT = 1 A
8
10
12
V
Maximum output voltage
VDD = 8 V,
average IOUT = 1 A
12
14
16
V
Charge pump UVLO minimum voltage
VDD = 3 V
6.5
8.8
10.1
V
Charge pump UVLO minimum voltage
to start
VDD = 8 V
6.5
9.9
11.5
V
Charge pump source impedance
VDD = 5 V,
average IOUT = 1 A
50
100
150
k
pin descriptions
CAP
A capacitor is placed from this pin to ground to filter the output of the on board charge pump. A 0.01-
F to 0.1-F
capacitor will work in most applications. Refer to TI literature number SLUA339 application note, Sizing the
UCC3919 ChargePump Capacitor, to determine the exact capacitance.
CSN
The negative current sense input signal.
CSP
The positive current sense input signal. Input to the duty cycle timer.
CT
Input to the duty cycle timer. A capacitor is connected from this pin to ground, setting the off time and maximum
on time of the over-current protection circuit.
FLT
Fault indicator. This open drain output will pull low under any fault condition where the output driver is disabled.
This output is disabled when the IC is in low current standby mode.
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