TLC5970 Datasheet, PDF (5/48 Pages) Texas Instruments – 3-Channel, 12-Bit, PWM LED Driver with Buck DC/DC Converter and Differential Signal Interface

TLC5970
www.ti.com
SBVS140 – MARCH 2010
ELECTRICAL CHARACTERISTICS
At V_CC = 10 V to 36 V and T_A = –40°C to +85°C. Typical values at V_CC = 24 V, FB = 17 V, and T_A = +25°C, unless otherwise
noted.
PARAMETER
BUCK DC/DC CONVERTER BLOCK
R_DSON
High-side MOS switch on-resistance
R_DSOFF
V_BOOT
V_BOOT1
V_SCP
High-side MOS switch off-resistance
Boot regulator output voltage
Short-circuit protection detection
I_FB
I_FB1
I_FB2
Input current
I_FB3
I_FB4
TEST CONDITIONS
At PH pin. VCC = 10 V to 36V, I_O = 500mA,
VBOOT = VCC + 9 V,
PH high-side MOS switch is on
At PH pin. VCC = 36 V, PH = 0 V,
PH high-side MOS switch is off
At BOOT pin. VCC = 10 V, IBOOT = –10 mA,
PH high-side MOS switch is off
At BOOT pin. VCC = 36 V, PH = 0 V,
IBOOT = no load,
PH high-side MOS switch is off
At FB pin
At FB pin. SDTA/SCKA = 0 V, SDTB/SCKB = 3 V,
SDTY/SDTZ/SCKY/SCKZ/PH/BOOT = open,
FB = 7 V to 17 V, V_OUTn = 1.0 V, GSn = 000h,
DCn = BC = 7Fh, R_IREF = 15 kΩ,
internal oscillator mode, and auto repeat mode
At FB pin. SDTA/SCKA = 0 V, SDTB/SCKB = 3 V,
SDTY/SDTZ/SCKY/SCKZ/PH/BOOT = open,
FB = 7 V to 17 V, V_OUTn = 1.0 V, GSn = 000h,
DCn = BC = 7Fh, R_IREF = 2 kΩ,
internal oscillator mode, and auto repeat mode
At FB pin. SDTA/SDTB = 10 MHz,
SCKA/SCKB = 20 MHz with 0 V to 3 V swing,
SDTY-SDTZ/SCKY-SCKZ = RL_DIF = 10 kΩ,
CL_DIF = 15 pF, PH/BOOT = open, FB = 7 V to 17 V,
V_OUTn = 1.0 V, GSn = FFFh, DCn = BC = 7Fh,
R_IREF = 2 kΩ, internal oscillator mode,
and auto repeat mode
At FB pin. SDTA/SDTB = 10 MHz,
SCKA/SCKB = 20 MHz with 0 V to 3 V swing,
SDTY-SDTZ/SCKY-SCKZ = RL_DIF = 2 × 51 Ω,
CL_DIF = 50 pF, PH/BOOT = open, FB = 7 V to 17 V,
V_OUTn = 1.0 V, GSn = FFFh, DCn = BC = 7Fh,
R_IREF = 2 kΩ, internal oscillator mode,
and auto repeat mode
At FB pin. SDTA/SDTB = 10 MHz,
SCKA/SCKB = 20 MHz with 0 V to 3 V swing,
SDTY-SDTZ/SCKY-SCKZ = RL_DIF = 2 × 51 Ω,
CL_DIF = 50 pF, PH/BOOT = open, FB = 7 V to 17 V,
V_OUTn = 1.0 V, GSn = FFFh, DCn = BC = 7Fh,
R_IREF = 1 kΩ, internal oscillator mode,
and auto repeat mode
TLC5970
MIN
TYP
MAX UNIT
300
770 MΩ
1
MΩ
8
V
10
V
3.75
4
4.25
V
18
29 mA
19
30 mA
36
60 mA
65
115 mA
68
130 mA
Copyright © 2010, Texas Instruments Incorporated
Product Folder Link(s): TLC5970
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